Finding the Fourth Proportional to 40,021.43, 55,227.78 and 22,116.05

Step by Step Solution

1. Step 1: Write the proportion equation
   40,021.43 : 55,227.78 = 22,116.05 : x
2. Step 2: Convert to fraction form
   40,021.43/55,227.78 = 22,116.05/x
3. Step 3: Cross multiply
   40,021.43x = 55,227.78 × 22,116.05
4. Step 4: Simplify right side
   40,021.43x = 1,221,420,067.73
5. Step 5: Solve for x
   x = 1,221,420,067.73/40,021.43
6. Step 6: Final answer
   x = 30,519.15