"proved wise" is correct and usable in written English.
You can use it to describe a decision or action that ended up being the best or most sensible choice. For example, "She proved wise when she chose to accept the job offer."
The decision proved wise.
Placing "The Yes Album" second in the rotation proved wise.
His determination to invest in scanning equipment while still at college proved wise given the difficulties faced by farmers since then.
With a.183 team batting average through the first four games, the decision proved wise and led to eight hits and six runs, which was one more than the Mariners had scored in the previous four games.
The decision proved wise, as their second album, Make It Big (1984), turned them into a global success story, spinning off singles such as Wake Me Up Before You Go-Go, Careless Whisper, Freedom and Everything She Wants.
That way, if their banks got into trouble and foreign financiers took flight, they would have a war chest of dollars with which to repay the foreigners and avoid a collapse in their currencies.This determination to run surpluses has proved wise: Brazil, Russia and South Korea have all drawn heavily on reserves during the current crisis.
His son Joseph took over, and quickly proved wiser than his father.
But the French had already proved wiser than the British when cleaning up Torrey Canyon crude.
But others think Mr Obama's caution has proven wise, given the political mess in Kabul.
In contrast, Glyndebourne's open attitude, its acknowledgement of hurdles and difficulties, may prove wise.
This proves wise as Manjit, who's not back until morning, must see me dilate.
