Finding the Fourth Proportional to 2,518.12, 3,474.88 and 1,399.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.12 : 3,474.88 = 1,399.02 : x
2. Step 2: Convert to fraction form
   2,518.12/3,474.88 = 1,399.02/x
3. Step 3: Cross multiply
   2,518.12x = 3,474.88 × 1,399.02
4. Step 4: Simplify right side
   2,518.12x = 4,861,426.62
5. Step 5: Solve for x
   x = 4,861,426.62/2,518.12
6. Step 6: Final answer
   x = 1,930.58