Finding the Fourth Proportional to 40,020.42, 55,229.25 and 22,116.54

Step by Step Solution

1. Step 1: Write the proportion equation
   40,020.42 : 55,229.25 = 22,116.54 : x
2. Step 2: Convert to fraction form
   40,020.42/55,229.25 = 22,116.54/x
3. Step 3: Cross multiply
   40,020.42x = 55,229.25 × 22,116.54
4. Step 4: Simplify right side
   40,020.42x = 1,221,479,916.80
5. Step 5: Solve for x
   x = 1,221,479,916.80/40,020.42
6. Step 6: Final answer
   x = 30,521.42