Finding the Fourth Proportional to 2,378.79, 3,281.72 and 1,434.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,378.79 : 3,281.72 = 1,434.33 : x
2. Step 2: Convert to fraction form
   2,378.79/3,281.72 = 1,434.33/x
3. Step 3: Cross multiply
   2,378.79x = 3,281.72 × 1,434.33
4. Step 4: Simplify right side
   2,378.79x = 4,707,062.28
5. Step 5: Solve for x
   x = 4,707,062.28/2,378.79
6. Step 6: Final answer
   x = 1,978.76