Q: iphone s4 iso7 connect to internet through computer

You can only use the phone to connect your computer to the Internet, not the other direction.

Check this article:

iOS: Understanding Personal Hotspot

Personal Hotspot lets you connect your computers and devices to the Internet using the cellular data connection on your device.

To use this feature, enable Personal Hotspot on your cellular data plan. Contact your carrier for information and pricing.

You may be able to have your computer share its Internet connection via Wi-Fi.  For a Mac:

<http://support.apple.com/kb/PH13855>