Finding the Fourth Proportional to 2,518.39, 3,475.56 and 1,399.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.39 : 3,475.56 = 1,399.69 : x
2. Step 2: Convert to fraction form
   2,518.39/3,475.56 = 1,399.69/x
3. Step 3: Cross multiply
   2,518.39x = 3,475.56 × 1,399.69
4. Step 4: Simplify right side
   2,518.39x = 4,864,706.58
5. Step 5: Solve for x
   x = 4,864,706.58/2,518.39
6. Step 6: Final answer
   x = 1,931.67