Finding the Fourth Proportional to 7,689.05, 10,616.72 and 7,566.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,689.05 : 10,616.72 = 7,566.48 : x
2. Step 2: Convert to fraction form
   7,689.05/10,616.72 = 7,566.48/x
3. Step 3: Cross multiply
   7,689.05x = 10,616.72 × 7,566.48
4. Step 4: Simplify right side
   7,689.05x = 80,331,199.55
5. Step 5: Solve for x
   x = 80,331,199.55/7,689.05
6. Step 6: Final answer
   x = 10,447.48