How to use LaTeX tables with MS Word/PowerPoint

To say it short: No.

Word has no inbuild tex distribution or engine to handle the LaTeX tables.

If you want to have LaTeX table in Word you can build it in LaTeX, compile it (with document class minimal or standalone) and add the resulting pdf in Word.

As far as I know is there no other way you want ...

Edit: Perhaps the best way is to show and teach your collaborators the beautiful typography of LaTeX ...

Edit: If you can include a pdf in your Word document directly depends on your used version of Word. Since Word 2010 you can do it directly (search msword include pdf file), before version 2010 not. Then you need the hints in the comments.