Remove last number from string

[Rup_1 (Rupesh)]

Hi,
Suppose i have a string like this:-

1 Set-Up Charge Set-Up Charge 44.0000 44.00
1 *Prepro Proof Charge Prepro Proof per Color 24.0000 24.00
892.18

and i want to remove last number i.e 892.18 then how i do.