Finding the Fourth Proportional to 8,756.43, 12,081.73 and 5,616.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,756.43 : 12,081.73 = 5,616.87 : x
2. Step 2: Convert to fraction form
   8,756.43/12,081.73 = 5,616.87/x
3. Step 3: Cross multiply
   8,756.43x = 12,081.73 × 5,616.87
4. Step 4: Simplify right side
   8,756.43x = 67,861,506.79
5. Step 5: Solve for x
   x = 67,861,506.79/8,756.43
6. Step 6: Final answer
   x = 7,749.91