Finding the Fourth Proportional to 2,518.49, 3,475.32 and 1,399.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.49 : 3,475.32 = 1,399.39 : x
2. Step 2: Convert to fraction form
   2,518.49/3,475.32 = 1,399.39/x
3. Step 3: Cross multiply
   2,518.49x = 3,475.32 × 1,399.39
4. Step 4: Simplify right side
   2,518.49x = 4,863,341.54
5. Step 5: Solve for x
   x = 4,863,341.54/2,518.49
6. Step 6: Final answer
   x = 1,931.05