Finding the Fourth Proportional to 2,518.05, 3,474.93 and 1,399.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.05 : 3,474.93 = 1,399.01 : x
2. Step 2: Convert to fraction form
   2,518.05/3,474.93 = 1,399.01/x
3. Step 3: Cross multiply
   2,518.05x = 3,474.93 × 1,399.01
4. Step 4: Simplify right side
   2,518.05x = 4,861,449.69
5. Step 5: Solve for x
   x = 4,861,449.69/2,518.05
6. Step 6: Final answer
   x = 1,930.64