Finding the Third Proportional to 71,293.92 and 99,679.36

Step by Step Solution

1. Step 1: Write the proportion equation
   71,293.92 : 99,679.36 = 99,679.36 : x
2. Step 2: Convert to fraction form
   71,293.92/99,679.36 = 99,679.36/x
3. Step 3: Cross multiply
   71,293.92x = 99,679.36 × 99,679.36
4. Step 4: Simplify right side
   71,293.92x = 9,935,974,685.41
5. Step 5: Solve for x
   x = 9,935,974,685.41/71,293.92
6. Step 6: Final answer
   x = 139,366.36