Finding the Third Proportional to 71,318.25 and 99,699.75

Step by Step Solution

1. Step 1: Write the proportion equation
   71,318.25 : 99,699.75 = 99,699.75 : x
2. Step 2: Convert to fraction form
   71,318.25/99,699.75 = 99,699.75/x
3. Step 3: Cross multiply
   71,318.25x = 99,699.75 × 99,699.75
4. Step 4: Simplify right side
   71,318.25x = 9,940,040,150.06
5. Step 5: Solve for x
   x = 9,940,040,150.06/71,318.25
6. Step 6: Final answer
   x = 139,375.83