Finding the Fourth Proportional to 42,456.44, 58,572.78 and 25,660.28

Step by Step Solution

1. Step 1: Write the proportion equation
   42,456.44 : 58,572.78 = 25,660.28 : x
2. Step 2: Convert to fraction form
   42,456.44/58,572.78 = 25,660.28/x
3. Step 3: Cross multiply
   42,456.44x = 58,572.78 × 25,660.28
4. Step 4: Simplify right side
   42,456.44x = 1,502,993,935.18
5. Step 5: Solve for x
   x = 1,502,993,935.18/42,456.44
6. Step 6: Final answer
   x = 35,400.85