Finding the Fourth Proportional to 2,447.42, 3,377.28 and 1,399.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.42 : 3,377.28 = 1,399.48 : x
2. Step 2: Convert to fraction form
   2,447.42/3,377.28 = 1,399.48/x
3. Step 3: Cross multiply
   2,447.42x = 3,377.28 × 1,399.48
4. Step 4: Simplify right side
   2,447.42x = 4,726,435.81
5. Step 5: Solve for x
   x = 4,726,435.81/2,447.42
6. Step 6: Final answer
   x = 1,931.19