Finding the Third Proportional to 59,638.78 and 129,796.17

Step by Step Solution

1. Step 1: Write the proportion equation
   59,638.78 : 129,796.17 = 129,796.17 : x
2. Step 2: Convert to fraction form
   59,638.78/129,796.17 = 129,796.17/x
3. Step 3: Cross multiply
   59,638.78x = 129,796.17 × 129,796.17
4. Step 4: Simplify right side
   59,638.78x = 16,847,046,233.40
5. Step 5: Solve for x
   x = 16,847,046,233.40/59,638.78
6. Step 6: Final answer
   x = 282,484.75