Finding the Fourth Proportional to 8,105.29, 12,072.70 and 7,726.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.29 : 12,072.70 = 7,726.09 : x
2. Step 2: Convert to fraction form
   8,105.29/12,072.70 = 7,726.09/x
3. Step 3: Cross multiply
   8,105.29x = 12,072.70 × 7,726.09
4. Step 4: Simplify right side
   8,105.29x = 93,274,766.74
5. Step 5: Solve for x
   x = 93,274,766.74/8,105.29
6. Step 6: Final answer
   x = 11,507.89