Finding the Fourth Proportional to 8,589.96, 12,943.46 and 7,064.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,589.96 : 12,943.46 = 7,064.15 : x
2. Step 2: Convert to fraction form
   8,589.96/12,943.46 = 7,064.15/x
3. Step 3: Cross multiply
   8,589.96x = 12,943.46 × 7,064.15
4. Step 4: Simplify right side
   8,589.96x = 91,434,542.96
5. Step 5: Solve for x
   x = 91,434,542.96/8,589.96
6. Step 6: Final answer
   x = 10,644.35