Finding the Third Proportional to 61,411.50 and 129,384

Step by Step Solution

1. Step 1: Write the proportion equation
   61,411.50 : 129,384 = 129,384 : x
2. Step 2: Convert to fraction form
   61,411.50/129,384 = 129,384/x
3. Step 3: Cross multiply
   61,411.50x = 129,384 × 129,384
4. Step 4: Simplify right side
   61,411.50x = 16,740,219,456
5. Step 5: Solve for x
   x = 16,740,219,456/61,411.50
6. Step 6: Final answer
   x = 272,590.96