Using Styles to align numbers in a cell--a real challenge!

I work a lot with stats that are shown in table format and would like all the numbers to right align (like a decimal tab). That I can do on a cell-by-cell basis. However, I want them to right align in the CENTRE of each column. I cannot format each column in each table to be the same width because the descriptive column labels vary greatly column to column and table to table.

Is there anyway to format a style so that the numbers are right aligned AND the whole colunm of numbers is centred (not the numbers being centred as then the last units (ones) do not line up)?

e.g., approximation of desired outcome:

| 7 | 29 |
| 42 | 7256 |
| 116 | 8 |


Hopefully this makes sense!

thx a mint for your help (=