Finding the Fourth Proportional to 31,058.24, 42,854.67 and 18,315.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,058.24 : 42,854.67 = 18,315.42 : x
2. Step 2: Convert to fraction form
   31,058.24/42,854.67 = 18,315.42/x
3. Step 3: Cross multiply
   31,058.24x = 42,854.67 × 18,315.42
4. Step 4: Simplify right side
   31,058.24x = 784,901,119.31
5. Step 5: Solve for x
   x = 784,901,119.31/31,058.24
6. Step 6: Final answer
   x = 25,271.92