Finding the Third Proportional to 315,432 and 488,700

Step by Step Solution

1. Step 1: Write the proportion equation
   315,432 : 488,700 = 488,700 : x
2. Step 2: Convert to fraction form
   315,432/488,700 = 488,700/x
3. Step 3: Cross multiply
   315,432x = 488,700 × 488,700
4. Step 4: Simplify right side
   315,432x = 238,827,690,000
5. Step 5: Solve for x
   x = 238,827,690,000/315,432
6. Step 6: Final answer
   x = 757,144.77