Finding the Third Proportional to 156,728 and 329,584

Step by Step Solution

1. Step 1: Write the proportion equation
   156,728 : 329,584 = 329,584 : x
2. Step 2: Convert to fraction form
   156,728/329,584 = 329,584/x
3. Step 3: Cross multiply
   156,728x = 329,584 × 329,584
4. Step 4: Simplify right side
   156,728x = 108,625,613,056
5. Step 5: Solve for x
   x = 108,625,613,056/156,728
6. Step 6: Final answer
   x = 693,083.64