Finding the Fourth Proportional to 8,653.16, 12,960.89 and 5,688.26

Step by Step Solution

1. Step 1: Write the proportion equation
   8,653.16 : 12,960.89 = 5,688.26 : x
2. Step 2: Convert to fraction form
   8,653.16/12,960.89 = 5,688.26/x
3. Step 3: Cross multiply
   8,653.16x = 12,960.89 × 5,688.26
4. Step 4: Simplify right side
   8,653.16x = 73,724,833.13
5. Step 5: Solve for x
   x = 73,724,833.13/8,653.16
6. Step 6: Final answer
   x = 8,519.99