The numerical data I am working with are the part numbers. They will be nothing but 4 digit numbers, followed by a decimal point and followed by another 4 digits. Here they are

7742.8858
7748.5855
5581.2272
1248.2257
6589.5586
5680.1886
8762.1898
5535.5795
6896.6571
6573.2575
5487.3275
5489.5633

I am just pasting few for your reference. The numbers goes on..on and on... I know this array has to be sorted but I am not able to work further removing the repeating entries.

Thank you for your immediate response.