Finding the Third Proportional to 218,904 and 478,944

Step by Step Solution

1. Step 1: Write the proportion equation
   218,904 : 478,944 = 478,944 : x
2. Step 2: Convert to fraction form
   218,904/478,944 = 478,944/x
3. Step 3: Cross multiply
   218,904x = 478,944 × 478,944
4. Step 4: Simplify right side
   218,904x = 229,387,355,136
5. Step 5: Solve for x
   x = 229,387,355,136/218,904
6. Step 6: Final answer
   x = 1,047,890.19