Both Uses

prosperous
in
Do You Speak American?
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Eventually Celeste married a skilled draftsman and became a highly respected figure on one of the most prosperous blocks in South Philadelphia.†
Chpt 2 *
In America's less hierarchical society, there has never been an official or socially imposed standard as there is in Britain, where the public schools (actually private, fee-paying schools) were set up in the nineteenth century to teach the sons of prosperous tradesmen to speak with a cultivated accent, like the sons of the aristocracy, who went to Eton.†
Chpt 3

Definitions:

(1) (prosperous)
successful or good -- especially with regard to finances or wealth
(2) (meaning too rare to warrant focus)