Finding the Third Proportional to 61,363.50 and 129,288

Step by Step Solution

1. Step 1: Write the proportion equation
   61,363.50 : 129,288 = 129,288 : x
2. Step 2: Convert to fraction form
   61,363.50/129,288 = 129,288/x
3. Step 3: Cross multiply
   61,363.50x = 129,288 × 129,288
4. Step 4: Simplify right side
   61,363.50x = 16,715,386,944
5. Step 5: Solve for x
   x = 16,715,386,944/61,363.50
6. Step 6: Final answer
   x = 272,399.50