Finding the Third Proportional to 131,499 and 213,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,499 : 213,640.50 = 213,640.50 : x
2. Step 2: Convert to fraction form
   131,499/213,640.50 = 213,640.50/x
3. Step 3: Cross multiply
   131,499x = 213,640.50 × 213,640.50
4. Step 4: Simplify right side
   131,499x = 45,642,263,240.25
5. Step 5: Solve for x
   x = 45,642,263,240.25/131,499
6. Step 6: Final answer
   x = 347,092.09