Finding the Fourth Proportional to 8,765.31, 12,065.43 and 7,644.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,765.31 : 12,065.43 = 7,644.27 : x
2. Step 2: Convert to fraction form
   8,765.31/12,065.43 = 7,644.27/x
3. Step 3: Cross multiply
   8,765.31x = 12,065.43 × 7,644.27
4. Step 4: Simplify right side
   8,765.31x = 92,231,404.59
5. Step 5: Solve for x
   x = 92,231,404.59/8,765.31
6. Step 6: Final answer
   x = 10,522.32