Hi Moni,
Check the test query.
SQL
DECLARE @InNumericValue NUMERIC(38,2)
SET @InNumericValue = 1116548238.53
DECLARE @RetVal VARCHAR(60)
        ,@StrRight  VARCHAR(5) 
        ,@StrFinal  VARCHAR(60)
        ,@StrLength INT
                 
SET @RetVal = ''
SET @RetVal= @InNumericValue 
SET @RetVal= SUBSTRING(@RetVal,1,CASE WHEN CHARINDEX('.', @RetVal)=0 THEN LEN(@RetVal)ELSE CHARINDEX('.',@RetVal)-1 END)
SET @StrLength = LEN(@RetVal)
IF(@StrLength > 6)
BEGIN
      SET @StrFinal = RIGHT(@RetVal,6)         
      SET @RetVal = SUBSTRING(@RetVal,-5,@StrLength)
      SET @StrLength = LEN(@RetVal)
      IF (LEN(@RetVal) > 0 AND LEN(@RetVal) < 3)
            BEGIN
            SET @StrFinal = @RetVal + ',' + @StrFinal
            END
      WHILE LEN(@RetVal) > 2
            BEGIN
            SET @StrRight=RIGHT(@RetVal,2)               
            SET @StrFinal = @StrRight + ',' + @StrFinal
            SET @RetVal = SUBSTRING(@RetVal,-1,@StrLength)
            SET @StrLength = LEN(@RetVal)
            IF(LEN(@RetVal) > 2)
            CONTINUE
            ELSE
            SET @StrFinal = @RetVal + ',' + @StrFinal
            BREAK
            END
      END
      ELSE
      BEGIN
            SET @StrFinal = @RetVal
      END
SELECT @StrFinal = ISNULL(@StrFinal,00)
SELECT @StrFinal 'Amount'
Output