1 The timing of the meeting is certainly fortuitous.
2 A series of fortuitous circumstances advanced her career.
3 Though he pretended their encounter was fortuitous, he'd actually been hanging around her usual haunts for the past two weeks, hoping she'd turn up.
4 Through some combination of political skill, fortuitous timing, well-tuned messaging, and sheer luck this has become the Summer of Sanders — in which an unkempt 73-year-old man who isn't even a member of the Democratic Party is mounting the strongest challenge to the Democratic establishment.
5 Have you ever fortuitously seen a Survivor castaway in real life?