4887.15 cannot be stored accurately as a floating-point number, which is causing your issue.

Could it be that (at least part of) the problem is that the OP is expecting that sprint("%d", 488714.999) will return the string 488715 ?
It won't: 
C:\>perl -le "print sprintf('%d', 488714.999);"
488714

[download]

Cheers,
Rob

In reply to Re^4: Padding with sprintf changing number by syphilis
in thread Padding with sprintf changing number by sachin raj aryan

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