Finding the Fourth Proportional to 3,559.98, 5,340.59 and 1,586.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,559.98 : 5,340.59 = 1,586.31 : x
2. Step 2: Convert to fraction form
   3,559.98/5,340.59 = 1,586.31/x
3. Step 3: Cross multiply
   3,559.98x = 5,340.59 × 1,586.31
4. Step 4: Simplify right side
   3,559.98x = 8,471,823.39
5. Step 5: Solve for x
   x = 8,471,823.39/3,559.98
6. Step 6: Final answer
   x = 2,379.74