Finding the Fourth Proportional to 8,059.71, 11,133.61 and 7,665.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,059.71 : 11,133.61 = 7,665.60 : x
2. Step 2: Convert to fraction form
   8,059.71/11,133.61 = 7,665.60/x
3. Step 3: Cross multiply
   8,059.71x = 11,133.61 × 7,665.60
4. Step 4: Simplify right side
   8,059.71x = 85,345,847.81
5. Step 5: Solve for x
   x = 85,345,847.81/8,059.71
6. Step 6: Final answer
   x = 10,589.20