Finding the Fourth Proportional to 2,518.26, 3,475.20 and 1,399.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.26 : 3,475.20 = 1,399.27 : x
2. Step 2: Convert to fraction form
   2,518.26/3,475.20 = 1,399.27/x
3. Step 3: Cross multiply
   2,518.26x = 3,475.20 × 1,399.27
4. Step 4: Simplify right side
   2,518.26x = 4,862,743.10
5. Step 5: Solve for x
   x = 4,862,743.10/2,518.26
6. Step 6: Final answer
   x = 1,930.99