Finding the Fourth Proportional to 39,892.43, 55,049.41 and 21,983.87

Step by Step Solution

1. Step 1: Write the proportion equation
   39,892.43 : 55,049.41 = 21,983.87 : x
2. Step 2: Convert to fraction form
   39,892.43/55,049.41 = 21,983.87/x
3. Step 3: Cross multiply
   39,892.43x = 55,049.41 × 21,983.87
4. Step 4: Simplify right side
   39,892.43x = 1,210,198,963.10
5. Step 5: Solve for x
   x = 1,210,198,963.10/39,892.43
6. Step 6: Final answer
   x = 30,336.56