Finding the Fourth Proportional to 2,518.29, 3,475.04 and 1,399.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.29 : 3,475.04 = 1,399.28 : x
2. Step 2: Convert to fraction form
   2,518.29/3,475.04 = 1,399.28/x
3. Step 3: Cross multiply
   2,518.29x = 3,475.04 × 1,399.28
4. Step 4: Simplify right side
   2,518.29x = 4,862,529.60
5. Step 5: Solve for x
   x = 4,862,529.60/2,518.29
6. Step 6: Final answer
   x = 1,930.89