Finding the Fourth Proportional to 22,121.10, 30,524.85 and 13,168.98

Step by Step Solution

1. Step 1: Write the proportion equation
   22,121.10 : 30,524.85 = 13,168.98 : x
2. Step 2: Convert to fraction form
   22,121.10/30,524.85 = 13,168.98/x
3. Step 3: Cross multiply
   22,121.10x = 30,524.85 × 13,168.98
4. Step 4: Simplify right side
   22,121.10x = 401,981,139.15
5. Step 5: Solve for x
   x = 401,981,139.15/22,121.10
6. Step 6: Final answer
   x = 18,171.84