1) The fortuitus meeting at the coffee shop eventually led to a successful business partnership.

2) They found a fortuitus escape route just as the building caught on fire.

3) The discovery of the lost treasure was purely fortuitus; they stumbled upon it by accident.

4) It was fortuitus that she had packed an umbrella, as it started raining unexpectedly.

5) His fortuitus encounter with a famous author inspired him to pursue a career in writing.

6) The fortuitus arrival of the ambulance saved the injured hiker's life.

7) The fortuitus donation enabled the charity to reach their fundraising goal.

8) It was fortuitus that she ran into her long-lost friend at the airport.

9) The fortuitus discovery of a new species in the rainforest thrilled the scientists.

10) Their fortuitus reunion after years of being apart brought back memories of their childhood.