Finding the Third Proportional to 42,528 and 57,728

Step by Step Solution

1. Step 1: Write the proportion equation
   42,528 : 57,728 = 57,728 : x
2. Step 2: Convert to fraction form
   42,528/57,728 = 57,728/x
3. Step 3: Cross multiply
   42,528x = 57,728 × 57,728
4. Step 4: Simplify right side
   42,528x = 3,332,521,984
5. Step 5: Solve for x
   x = 3,332,521,984/42,528
6. Step 6: Final answer
   x = 78,360.66