Oh, yes, she can ensure his happiness, keep him in the university, make him a partner in the office, make his whole future secure; perhaps he may even be a rich man later on, prosperous, respected, and may even end his life a famous man!
There are no more uses of "prosperous" in the book.
Show samples from other sources
She owns a prosperous law firm.
But in spite of these disadvantages, he had begun even in his father’s lifetime to lay the foundations of a prosperous future.