Finding the Fourth Proportional to 8,857.56, 12,223.32 and 5,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,857.56 : 12,223.32 = 5,131.56 : x
2. Step 2: Convert to fraction form
   8,857.56/12,223.32 = 5,131.56/x
3. Step 3: Cross multiply
   8,857.56x = 12,223.32 × 5,131.56
4. Step 4: Simplify right side
   8,857.56x = 62,724,699.98
5. Step 5: Solve for x
   x = 62,724,699.98/8,857.56
6. Step 6: Final answer
   x = 7,081.49