Finding the Third Proportional to 61,025.50 and 128,612

Step by Step Solution

1. Step 1: Write the proportion equation
   61,025.50 : 128,612 = 128,612 : x
2. Step 2: Convert to fraction form
   61,025.50/128,612 = 128,612/x
3. Step 3: Cross multiply
   61,025.50x = 128,612 × 128,612
4. Step 4: Simplify right side
   61,025.50x = 16,541,046,544
5. Step 5: Solve for x
   x = 16,541,046,544/61,025.50
6. Step 6: Final answer
   x = 271,051.39