Finding the Third Proportional to 151,432 and 315,280

Step by Step Solution

1. Step 1: Write the proportion equation
   151,432 : 315,280 = 315,280 : x
2. Step 2: Convert to fraction form
   151,432/315,280 = 315,280/x
3. Step 3: Cross multiply
   151,432x = 315,280 × 315,280
4. Step 4: Simplify right side
   151,432x = 99,401,478,400
5. Step 5: Solve for x
   x = 99,401,478,400/151,432
6. Step 6: Final answer
   x = 656,410.00