Finding the Fourth Proportional to 2,839.67, 4,259.78 and 1,086.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.67 : 4,259.78 = 1,086.15 : x
2. Step 2: Convert to fraction form
   2,839.67/4,259.78 = 1,086.15/x
3. Step 3: Cross multiply
   2,839.67x = 4,259.78 × 1,086.15
4. Step 4: Simplify right side
   2,839.67x = 4,626,750.06
5. Step 5: Solve for x
   x = 4,626,750.06/2,839.67
6. Step 6: Final answer
   x = 1,629.33