Finding the Fourth Proportional to 10,688.69, 16,020.05 and 7,569.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.69 : 16,020.05 = 7,569.61 : x
2. Step 2: Convert to fraction form
   10,688.69/16,020.05 = 7,569.61/x
3. Step 3: Cross multiply
   10,688.69x = 16,020.05 × 7,569.61
4. Step 4: Simplify right side
   10,688.69x = 121,265,452.78
5. Step 5: Solve for x
   x = 121,265,452.78/10,688.69
6. Step 6: Final answer
   x = 11,345.21