230.7
9,034.7
It is 9034.7
thirty-seven and eight tenths
0.739
Fifty-six thousand, two hundred thirty-seven hundred thousandths
The decimal notation for thirty and seven-tenths is 30.7
37.4
thirty-seven and eight tenths
It is 9034.7
9,034.7
"One hundred and thirty-seven". Or "one hundred, thirty-seven". (if the number modifies a larger number, use the "and", as in "one hundred and thirty-seven thousand"). For room numbers, employee ID numbers, and so forth, a simple "one three seven" or "one thirty seven" can be used.
Five thousand, seven hundred and thirty. Or, Five thousand, seven hundred and thirty point zero (if you want to keep it as a decimal to two decimal places).
one hundred eighty- seven and thirty-three tenths
0.739
7000.437
Fifty-six thousand, two hundred thirty-seven hundred thousandths
Thirty-seven thousand, nine hundred seventy-one and seven tenths.