Finding the Fourth Proportional to 8,386.56, 12,581.65 and 2,543.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,386.56 : 12,581.65 = 2,543.61 : x
2. Step 2: Convert to fraction form
   8,386.56/12,581.65 = 2,543.61/x
3. Step 3: Cross multiply
   8,386.56x = 12,581.65 × 2,543.61
4. Step 4: Simplify right side
   8,386.56x = 32,002,810.76
5. Step 5: Solve for x
   x = 32,002,810.76/8,386.56
6. Step 6: Final answer
   x = 3,815.96