Finding the Fourth Proportional to 22,803.42, 31,472.82 and 13,605.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,803.42 : 31,472.82 = 13,605.57 : x
2. Step 2: Convert to fraction form
   22,803.42/31,472.82 = 13,605.57/x
3. Step 3: Cross multiply
   22,803.42x = 31,472.82 × 13,605.57
4. Step 4: Simplify right side
   22,803.42x = 428,205,655.61
5. Step 5: Solve for x
   x = 428,205,655.61/22,803.42
6. Step 6: Final answer
   x = 18,778.13