Finding the Fourth Proportional to 8,723.17, 12,042.05 and 5,581.18

Step by Step Solution

1. Step 1: Write the proportion equation
   8,723.17 : 12,042.05 = 5,581.18 : x
2. Step 2: Convert to fraction form
   8,723.17/12,042.05 = 5,581.18/x
3. Step 3: Cross multiply
   8,723.17x = 12,042.05 × 5,581.18
4. Step 4: Simplify right side
   8,723.17x = 67,208,856.84
5. Step 5: Solve for x
   x = 67,208,856.84/8,723.17
6. Step 6: Final answer
   x = 7,704.64