Finding the Fourth Proportional to 8,707.43, 12,018.17 and 5,723.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,707.43 : 12,018.17 = 5,723.54 : x
2. Step 2: Convert to fraction form
   8,707.43/12,018.17 = 5,723.54/x
3. Step 3: Cross multiply
   8,707.43x = 12,018.17 × 5,723.54
4. Step 4: Simplify right side
   8,707.43x = 68,786,506.77
5. Step 5: Solve for x
   x = 68,786,506.77/8,707.43
6. Step 6: Final answer
   x = 7,899.75