Finding the Fourth Proportional to 2,518.30, 3,475.43 and 1,399.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.30 : 3,475.43 = 1,399.29 : x
2. Step 2: Convert to fraction form
   2,518.30/3,475.43 = 1,399.29/x
3. Step 3: Cross multiply
   2,518.30x = 3,475.43 × 1,399.29
4. Step 4: Simplify right side
   2,518.30x = 4,863,134.44
5. Step 5: Solve for x
   x = 4,863,134.44/2,518.30
6. Step 6: Final answer
   x = 1,931.12