Finding the Third Proportional to 72,756.31 and 108,686.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,756.31 : 108,686.38 = 108,686.38 : x
2. Step 2: Convert to fraction form
   72,756.31/108,686.38 = 108,686.38/x
3. Step 3: Cross multiply
   72,756.31x = 108,686.38 × 108,686.38
4. Step 4: Simplify right side
   72,756.31x = 11,812,728,110.64
5. Step 5: Solve for x
   x = 11,812,728,110.64/72,756.31
6. Step 6: Final answer
   x = 162,360.18