Finding the Fourth Proportional to 2,568.24, 3,853.85 and 1,398.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.24 : 3,853.85 = 1,398.20 : x
2. Step 2: Convert to fraction form
   2,568.24/3,853.85 = 1,398.20/x
3. Step 3: Cross multiply
   2,568.24x = 3,853.85 × 1,398.20
4. Step 4: Simplify right side
   2,568.24x = 5,388,426.81
5. Step 5: Solve for x
   x = 5,388,426.81/2,568.24
6. Step 6: Final answer
   x = 2,098.10