Finding the Fourth Proportional to 22,490.35, 31,039.42 and 13,058.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,490.35 : 31,039.42 = 13,058.91 : x
2. Step 2: Convert to fraction form
   22,490.35/31,039.42 = 13,058.91/x
3. Step 3: Cross multiply
   22,490.35x = 31,039.42 × 13,058.91
4. Step 4: Simplify right side
   22,490.35x = 405,340,959.58
5. Step 5: Solve for x
   x = 405,340,959.58/22,490.35
6. Step 6: Final answer
   x = 18,022.89