Finding the Fourth Proportional to 35,724.72, 49,304.17 and 20,621.43

Step by Step Solution

1. Step 1: Write the proportion equation
   35,724.72 : 49,304.17 = 20,621.43 : x
2. Step 2: Convert to fraction form
   35,724.72/49,304.17 = 20,621.43/x
3. Step 3: Cross multiply
   35,724.72x = 49,304.17 × 20,621.43
4. Step 4: Simplify right side
   35,724.72x = 1,016,722,490.36
5. Step 5: Solve for x
   x = 1,016,722,490.36/35,724.72
6. Step 6: Final answer
   x = 28,459.91