Finding the Third Proportional to 82,842.50 and 129,180

Step by Step Solution

1. Step 1: Write the proportion equation
   82,842.50 : 129,180 = 129,180 : x
2. Step 2: Convert to fraction form
   82,842.50/129,180 = 129,180/x
3. Step 3: Cross multiply
   82,842.50x = 129,180 × 129,180
4. Step 4: Simplify right side
   82,842.50x = 16,687,472,400
5. Step 5: Solve for x
   x = 16,687,472,400/82,842.50
6. Step 6: Final answer
   x = 201,436.13