Finding the Third Proportional to 31,309.66 and 63,712.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,309.66 : 63,712.83 = 63,712.83 : x
2. Step 2: Convert to fraction form
   31,309.66/63,712.83 = 63,712.83/x
3. Step 3: Cross multiply
   31,309.66x = 63,712.83 × 63,712.83
4. Step 4: Simplify right side
   31,309.66x = 4,059,324,467.69
5. Step 5: Solve for x
   x = 4,059,324,467.69/31,309.66
6. Step 6: Final answer
   x = 129,650.85