Finding the Fourth Proportional to 8,822.40, 13,168.80 and 8,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,822.40 : 13,168.80 = 8,238.72 : x
2. Step 2: Convert to fraction form
   8,822.40/13,168.80 = 8,238.72/x
3. Step 3: Cross multiply
   8,822.40x = 13,168.80 × 8,238.72
4. Step 4: Simplify right side
   8,822.40x = 108,494,055.94
5. Step 5: Solve for x
   x = 108,494,055.94/8,822.40
6. Step 6: Final answer
   x = 12,297.57