Finding the Fourth Proportional to 8,551.49, 12,807.38 and 8,255.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,551.49 : 12,807.38 = 8,255.81 : x
2. Step 2: Convert to fraction form
   8,551.49/12,807.38 = 8,255.81/x
3. Step 3: Cross multiply
   8,551.49x = 12,807.38 × 8,255.81
4. Step 4: Simplify right side
   8,551.49x = 105,735,348.54
5. Step 5: Solve for x
   x = 105,735,348.54/8,551.49
6. Step 6: Final answer
   x = 12,364.56