Finding the Fourth Proportional to 8,871.87, 12,243.20 and 5,286.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,871.87 : 12,243.20 = 5,286.27 : x
2. Step 2: Convert to fraction form
   8,871.87/12,243.20 = 5,286.27/x
3. Step 3: Cross multiply
   8,871.87x = 12,243.20 × 5,286.27
4. Step 4: Simplify right side
   8,871.87x = 64,720,834.43
5. Step 5: Solve for x
   x = 64,720,834.43/8,871.87
6. Step 6: Final answer
   x = 7,295.06