Finding the Fourth Proportional to 31,007.16, 42,789.36 and 17,578.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.16 : 42,789.36 = 17,578.32 : x
2. Step 2: Convert to fraction form
   31,007.16/42,789.36 = 17,578.32/x
3. Step 3: Cross multiply
   31,007.16x = 42,789.36 × 17,578.32
4. Step 4: Simplify right side
   31,007.16x = 752,165,062.68
5. Step 5: Solve for x
   x = 752,165,062.68/31,007.16
6. Step 6: Final answer
   x = 24,257.79