Finding the Fourth Proportional to 2,447.12, 3,377.03 and 1,399.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.12 : 3,377.03 = 1,399.18 : x
2. Step 2: Convert to fraction form
   2,447.12/3,377.03 = 1,399.18/x
3. Step 3: Cross multiply
   2,447.12x = 3,377.03 × 1,399.18
4. Step 4: Simplify right side
   2,447.12x = 4,725,061.62
5. Step 5: Solve for x
   x = 4,725,061.62/2,447.12
6. Step 6: Final answer
   x = 1,930.87