Finding the Fourth Proportional to 2,839.59, 4,258.98 and 1,378.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.59 : 4,258.98 = 1,378.35 : x
2. Step 2: Convert to fraction form
   2,839.59/4,258.98 = 1,378.35/x
3. Step 3: Cross multiply
   2,839.59x = 4,258.98 × 1,378.35
4. Step 4: Simplify right side
   2,839.59x = 5,870,365.08
5. Step 5: Solve for x
   x = 5,870,365.08/2,839.59
6. Step 6: Final answer
   x = 2,067.33