Finding the Third Proportional to 131,474 and 213,605

Step by Step Solution

1. Step 1: Write the proportion equation
   131,474 : 213,605 = 213,605 : x
2. Step 2: Convert to fraction form
   131,474/213,605 = 213,605/x
3. Step 3: Cross multiply
   131,474x = 213,605 × 213,605
4. Step 4: Simplify right side
   131,474x = 45,627,096,025
5. Step 5: Solve for x
   x = 45,627,096,025/131,474
6. Step 6: Final answer
   x = 347,042.73