Reduce space between a numbered bullet and a text programatically

Hi All,

I have a table that has a column,like this

1.1.1.  hi

1.1.2.  hello 

'

'

' 

1.1.11            hi ====> here we can see there is suddenly so much space between number and the text.

otable.Range.Paragraphs.TabStops.Add(some value, Word.WdTabAlignment.wdAlignTabLeft); also doesn'nt seem to work.

How can I reduce this spacing using c# ? Any help is unconditionally appreciated.Thanks in advance !