Finding the Fourth Proportional to 2,839.20, 3,918.83 and 2,543.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.20 : 3,918.83 = 2,543.96 : x
2. Step 2: Convert to fraction form
   2,839.20/3,918.83 = 2,543.96/x
3. Step 3: Cross multiply
   2,839.20x = 3,918.83 × 2,543.96
4. Step 4: Simplify right side
   2,839.20x = 9,969,314.45
5. Step 5: Solve for x
   x = 9,969,314.45/2,839.20
6. Step 6: Final answer
   x = 3,511.31