Search a string in a text file and add another string at the particular position of a line

Shell Programming and Scripting
1

I am having a text file which is having more than 200 lines.

EX:

       001010122    12000 BIB 12000 11200  1200003  
       001010122    2000  AND 12000 11200  1200003 
       001010122    12000 KVB 12000 11200  1200003

In the above file i want to search for string KVB and add/replace another string BANK at 150th position of particular line

Result

       001010122    12000 BIB 12000 11200  1200003  
       001010122    2000  AND 12000 11200  1200003 
       001010122    12000 KVB 12000 11200  1200003    BANK
2

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