The phrase "a fortuitous one" is correct and usable in written English.
It can be used to describe something that is fortunate or lucky, often in a surprising or unexpected way.
Example: "The meeting turned out to be a fortuitous one, leading to a lucrative partnership."
Alternatives: "a lucky one" or "an unexpected benefit".
Star Daniel Day-Lewis, who plays obsessive fashion designer Reynolds Woodcock, learned dressmaking and also joined Bridges and Anderson on research forays, including a fortuitous one to London's Victoria and Albert Museum.
But many of the flavors and ingredients are local, and the combination is a fortuitous one.
For McCarver and Buck, the managerial matchup between Torre and Arizona's Bob Brenly is a fortuitous one.
His Identification with economy of the opening decades of the nineteenth century was a fortuitous one, but his progress into the new years cannot be said to have fairly started.
Only the final goal was his, and it was a fortuitous one at that, but Ronaldo – who last scored a competitive goal for his country at Euro 2008 – insists he was not concerned.
He carries only an iPhone, but that's all he needs, along with his great charm: the light touch on the arm as he chaperones his guest, the occasional conspiratorial wink as he speaks, which might be a facial tic, in which case it is a fortuitous one.
And it wound up being very apt, since it represented a fork in my life's path, and a very fortuitous one at that!
The building's address is a most fortuitous one.
The actual distribution of regeneration among living things, however, seems at first glance to be a rather fortuitous one.
And the partnership, which was almost an afterthought, became a happy and highly fortuitous one as Murray became the first senior British champion at Wimbledon since Jeremy Bates and Jo Durie won the mixed doubles title in 1987.
But as the focus on climate change has intensified, so has scrutiny over the museum's ties to prominent climate deniers, and the brouhaha over the gala honoring the homophobic, climate-denying Brazilian president came at a fortuitous time for one New York City grassroots group.
