Finding the Fourth Proportional to 22,939.25, 31,656.22 and 13,385.71

Step by Step Solution

1. Step 1: Write the proportion equation
   22,939.25 : 31,656.22 = 13,385.71 : x
2. Step 2: Convert to fraction form
   22,939.25/31,656.22 = 13,385.71/x
3. Step 3: Cross multiply
   22,939.25x = 31,656.22 × 13,385.71
4. Step 4: Simplify right side
   22,939.25x = 423,740,980.62
5. Step 5: Solve for x
   x = 423,740,980.62/22,939.25
6. Step 6: Final answer
   x = 18,472.31