Finding the Fourth Proportional to 22,057.40, 30,426.89 and 13,553.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,057.40 : 30,426.89 = 13,553.61 : x
2. Step 2: Convert to fraction form
   22,057.40/30,426.89 = 13,553.61/x
3. Step 3: Cross multiply
   22,057.40x = 30,426.89 × 13,553.61
4. Step 4: Simplify right side
   22,057.40x = 412,394,132.80
5. Step 5: Solve for x
   x = 412,394,132.80/22,057.40
6. Step 6: Final answer
   x = 18,696.41