Finding the Third Proportional to 59,857.50 and 128,535

Step by Step Solution

1. Step 1: Write the proportion equation
   59,857.50 : 128,535 = 128,535 : x
2. Step 2: Convert to fraction form
   59,857.50/128,535 = 128,535/x
3. Step 3: Cross multiply
   59,857.50x = 128,535 × 128,535
4. Step 4: Simplify right side
   59,857.50x = 16,521,246,225
5. Step 5: Solve for x
   x = 16,521,246,225/59,857.50
6. Step 6: Final answer
   x = 276,009.63