Finding the Third Proportional to 39,728 and 57,940

Step by Step Solution

1. Step 1: Write the proportion equation
   39,728 : 57,940 = 57,940 : x
2. Step 2: Convert to fraction form
   39,728/57,940 = 57,940/x
3. Step 3: Cross multiply
   39,728x = 57,940 × 57,940
4. Step 4: Simplify right side
   39,728x = 3,357,043,600
5. Step 5: Solve for x
   x = 3,357,043,600/39,728
6. Step 6: Final answer
   x = 84,500.69