Finding the Fourth Proportional to 8,900.25, 12,287.25 and 6,661.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,900.25 : 12,287.25 = 6,661.31 : x
2. Step 2: Convert to fraction form
   8,900.25/12,287.25 = 6,661.31/x
3. Step 3: Cross multiply
   8,900.25x = 12,287.25 × 6,661.31
4. Step 4: Simplify right side
   8,900.25x = 81,849,119.86
5. Step 5: Solve for x
   x = 81,849,119.86/8,900.25
6. Step 6: Final answer
   x = 9,196.28