Finding the Fourth Proportional to 2,518.38, 3,475.29 and 1,399.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.38 : 3,475.29 = 1,399.29 : x
2. Step 2: Convert to fraction form
   2,518.38/3,475.29 = 1,399.29/x
3. Step 3: Cross multiply
   2,518.38x = 3,475.29 × 1,399.29
4. Step 4: Simplify right side
   2,518.38x = 4,862,938.54
5. Step 5: Solve for x
   x = 4,862,938.54/2,518.38
6. Step 6: Final answer
   x = 1,930.98