Finding the Fourth Proportional to 8,857.40, 12,223.17 and 4,878.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,857.40 : 12,223.17 = 4,878.50 : x
2. Step 2: Convert to fraction form
   8,857.40/12,223.17 = 4,878.50/x
3. Step 3: Cross multiply
   8,857.40x = 12,223.17 × 4,878.50
4. Step 4: Simplify right side
   8,857.40x = 59,630,673.73
5. Step 5: Solve for x
   x = 59,630,673.73/8,857.40
6. Step 6: Final answer
   x = 6,732.30