Finding the Fourth Proportional to 2,434.57, 3,359.79 and 1,386.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,434.57 : 3,359.79 = 1,386.70 : x
2. Step 2: Convert to fraction form
   2,434.57/3,359.79 = 1,386.70/x
3. Step 3: Cross multiply
   2,434.57x = 3,359.79 × 1,386.70
4. Step 4: Simplify right side
   2,434.57x = 4,659,012.39
5. Step 5: Solve for x
   x = 4,659,012.39/2,434.57
6. Step 6: Final answer
   x = 1,913.69