Finding the Fourth Proportional to 2,554.31, 3,831.49 and 1,399.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,554.31 : 3,831.49 = 1,399.43 : x
2. Step 2: Convert to fraction form
   2,554.31/3,831.49 = 1,399.43/x
3. Step 3: Cross multiply
   2,554.31x = 3,831.49 × 1,399.43
4. Step 4: Simplify right side
   2,554.31x = 5,361,902.05
5. Step 5: Solve for x
   x = 5,361,902.05/2,554.31
6. Step 6: Final answer
   x = 2,099.16