Finding the Fourth Proportional to 2,434.70, 3,359.92 and 1,386.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,434.70 : 3,359.92 = 1,386.78 : x
2. Step 2: Convert to fraction form
   2,434.70/3,359.92 = 1,386.78/x
3. Step 3: Cross multiply
   2,434.70x = 3,359.92 × 1,386.78
4. Step 4: Simplify right side
   2,434.70x = 4,659,469.86
5. Step 5: Solve for x
   x = 4,659,469.86/2,434.70
6. Step 6: Final answer
   x = 1,913.78