Finding the Fourth Proportional to 2,568.15, 3,852.09 and 1,399.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,568.15 : 3,852.09 = 1,399.05 : x
2. Step 2: Convert to fraction form
   2,568.15/3,852.09 = 1,399.05/x
3. Step 3: Cross multiply
   2,568.15x = 3,852.09 × 1,399.05
4. Step 4: Simplify right side
   2,568.15x = 5,389,266.51
5. Step 5: Solve for x
   x = 5,389,266.51/2,568.15
6. Step 6: Final answer
   x = 2,098.50