Finding the Fourth Proportional to 10,840.40, 14,966.72 and 8,855.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840.40 : 14,966.72 = 8,855.72 : x
2. Step 2: Convert to fraction form
   10,840.40/14,966.72 = 8,855.72/x
3. Step 3: Cross multiply
   10,840.40x = 14,966.72 × 8,855.72
4. Step 4: Simplify right side
   10,840.40x = 132,541,081.64
5. Step 5: Solve for x
   x = 132,541,081.64/10,840.40
6. Step 6: Final answer
   x = 12,226.59