All chinese dialects are derived from middle chinese except Min dialect, which grow out of old chinese.
Thanks to a great monograph on phonetics (qieyun, 切韵 )written in Song Dynasty (Circa 1000AD), we are able to reconstruct the pronunciation of middle chinese and know waht our ancestors talked like one thousand years ago. but the pronunciation of old chinese is still much left to unknown
here goes some tutorial course for basic middle chinese
and Here is a example of pronunciations of numerals in major chinese dialects, old chinese, tibetan, japanese, Vietnamese, and korean.
Knowing Mandarin, Cantonese and some japanese, I can understand the numerals pronounced in middle chinese the first time I heard it without looking at the subtitle. Really amazing! for me it sounds like Cantonese. the numerals in Lhasa tibetan and Korean are also understandable.