Finding the Fourth Proportional to 5,581.29, 7,702.57 and 3,689.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,581.29 : 7,702.57 = 3,689.59 : x
2. Step 2: Convert to fraction form
   5,581.29/7,702.57 = 3,689.59/x
3. Step 3: Cross multiply
   5,581.29x = 7,702.57 × 3,689.59
4. Step 4: Simplify right side
   5,581.29x = 28,419,352.58
5. Step 5: Solve for x
   x = 28,419,352.58/5,581.29
6. Step 6: Final answer
   x = 5,091.89