Finding the Fourth Proportional to 2,891.50, 4,337.37 and 839.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.50 : 4,337.37 = 839.50 : x
2. Step 2: Convert to fraction form
   2,891.50/4,337.37 = 839.50/x
3. Step 3: Cross multiply
   2,891.50x = 4,337.37 × 839.50
4. Step 4: Simplify right side
   2,891.50x = 3,641,222.12
5. Step 5: Solve for x
   x = 3,641,222.12/2,891.50
6. Step 6: Final answer
   x = 1,259.28