Finding the Third Proportional to 156,910 and 322,089

Step by Step Solution

1. Step 1: Write the proportion equation
   156,910 : 322,089 = 322,089 : x
2. Step 2: Convert to fraction form
   156,910/322,089 = 322,089/x
3. Step 3: Cross multiply
   156,910x = 322,089 × 322,089
4. Step 4: Simplify right side
   156,910x = 103,741,323,921
5. Step 5: Solve for x
   x = 103,741,323,921/156,910
6. Step 6: Final answer
   x = 661,151.77