You can do this using gparted, however I would recommend you back everything up before you do it as this is very risky if you have not done it before, you can easily destroy all of your data.
Depending on the layout of your drive you would need to reduce the size of your windows partition. Be aware that you cannot increase the size of a partition from the start of the partition, only the end, so you may need to move your fedora partition to the left before your expand the partition to fill the available space