Installing Windows, Fedora and Ubuntu......

In My Case

          1)  installed Windows first
                     Total Space 160GB
allocated 60GB for Windows
     
         2) Complete the Installtion
          3) Install Fedora second
From the rest 90GB available allocate 20Gb for Fedora

         4)Complete Fedora Installation

         5)Install Ubuntu third
Allocate 70GB available for Ubuntu

       6)Use the free space of 70GB to make the following partitions
           a)Make a 500Mb partition for the Boot
           b)Make 2GB partition for Swap
           c)Use the Rest of Partition for Root

       7) Install Ubuntu

Once complete you will see all the three OS while booting.