Finding the Third Proportional to 152,728 and 315,930

Step by Step Solution

1. Step 1: Write the proportion equation
   152,728 : 315,930 = 315,930 : x
2. Step 2: Convert to fraction form
   152,728/315,930 = 315,930/x
3. Step 3: Cross multiply
   152,728x = 315,930 × 315,930
4. Step 4: Simplify right side
   152,728x = 99,811,764,900
5. Step 5: Solve for x
   x = 99,811,764,900/152,728
6. Step 6: Final answer
   x = 653,526.30