Finding the Third Proportional to 86,710.50 and 129,708

Step by Step Solution

1. Step 1: Write the proportion equation
   86,710.50 : 129,708 = 129,708 : x
2. Step 2: Convert to fraction form
   86,710.50/129,708 = 129,708/x
3. Step 3: Cross multiply
   86,710.50x = 129,708 × 129,708
4. Step 4: Simplify right side
   86,710.50x = 16,824,165,264
5. Step 5: Solve for x
   x = 16,824,165,264/86,710.50
6. Step 6: Final answer
   x = 194,026.85