Finding the Third Proportional to 42,558 and 57,249

Step by Step Solution

1. Step 1: Write the proportion equation
   42,558 : 57,249 = 57,249 : x
2. Step 2: Convert to fraction form
   42,558/57,249 = 57,249/x
3. Step 3: Cross multiply
   42,558x = 57,249 × 57,249
4. Step 4: Simplify right side
   42,558x = 3,277,448,001
5. Step 5: Solve for x
   x = 3,277,448,001/42,558
6. Step 6: Final answer
   x = 77,011.33