$ sudo apt-get update
$ sudo apt-get install libgsoap4 

libgsoap4 is installed in your system.

Make ensure the libgsoap4 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libgsoap4 *

You will get with libgsoap4 package name, version, architecture and description in a table

libgsoap4 package basic information: