The book "Thinking Forth" contains a quote from Charles Moore: "In my accounting system [...]"; the example shows two significant places after the decimal point for the dollar amount - whether the type is floating point or fixed decimal is naturally implicit (and uninferable from the example).
Nothing in that vignette contradicts the observations of the article.
I'm fairly sure it was fixed-point. Floating-point accounting is widely considered a bad idea, even in places that are otherwise positive about floating-point.
Nothing in that vignette contradicts the observations of the article.