Finding the Fourth Proportional to 5,821.39, 8,687.36 and 5,198.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,821.39 : 8,687.36 = 5,198.59 : x
2. Step 2: Convert to fraction form
   5,821.39/8,687.36 = 5,198.59/x
3. Step 3: Cross multiply
   5,821.39x = 8,687.36 × 5,198.59
4. Step 4: Simplify right side
   5,821.39x = 45,162,022.82
5. Step 5: Solve for x
   x = 45,162,022.82/5,821.39
6. Step 6: Final answer
   x = 7,757.94