Finding the Third Proportional to 71,319.38 and 99,703.88

Step by Step Solution

1. Step 1: Write the proportion equation
   71,319.38 : 99,703.88 = 99,703.88 : x
2. Step 2: Convert to fraction form
   71,319.38/99,703.88 = 99,703.88/x
3. Step 3: Cross multiply
   71,319.38x = 99,703.88 × 99,703.88
4. Step 4: Simplify right side
   71,319.38x = 9,940,862,690.02
5. Step 5: Solve for x
   x = 9,940,862,690.02/71,319.38
6. Step 6: Final answer
   x = 139,385.16