Finding the Third Proportional to 71,284.50 and 99,660.75

Step by Step Solution

1. Step 1: Write the proportion equation
   71,284.50 : 99,660.75 = 99,660.75 : x
2. Step 2: Convert to fraction form
   71,284.50/99,660.75 = 99,660.75/x
3. Step 3: Cross multiply
   71,284.50x = 99,660.75 × 99,660.75
4. Step 4: Simplify right side
   71,284.50x = 9,932,265,090.56
5. Step 5: Solve for x
   x = 9,932,265,090.56/71,284.50
6. Step 6: Final answer
   x = 139,332.75