Finding the Fourth Proportional to 22,738.43, 31,379.90 and 13,178.63

Step by Step Solution

1. Step 1: Write the proportion equation
   22,738.43 : 31,379.90 = 13,178.63 : x
2. Step 2: Convert to fraction form
   22,738.43/31,379.90 = 13,178.63/x
3. Step 3: Cross multiply
   22,738.43x = 31,379.90 × 13,178.63
4. Step 4: Simplify right side
   22,738.43x = 413,543,868.74
5. Step 5: Solve for x
   x = 413,543,868.74/22,738.43
6. Step 6: Final answer
   x = 18,187.01