Finding the Third Proportional to 131,577 and 318,156

Step by Step Solution

1. Step 1: Write the proportion equation
   131,577 : 318,156 = 318,156 : x
2. Step 2: Convert to fraction form
   131,577/318,156 = 318,156/x
3. Step 3: Cross multiply
   131,577x = 318,156 × 318,156
4. Step 4: Simplify right side
   131,577x = 101,223,240,336
5. Step 5: Solve for x
   x = 101,223,240,336/131,577
6. Step 6: Final answer
   x = 769,308.01