Finding the Fourth Proportional to 8,857.31, 12,222.56 and 5,081.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,857.31 : 12,222.56 = 5,081.09 : x
2. Step 2: Convert to fraction form
   8,857.31/12,222.56 = 5,081.09/x
3. Step 3: Cross multiply
   8,857.31x = 12,222.56 × 5,081.09
4. Step 4: Simplify right side
   8,857.31x = 62,103,878.98
5. Step 5: Solve for x
   x = 62,103,878.98/8,857.31
6. Step 6: Final answer
   x = 7,011.60