Finding the Fourth Proportional to 8,105.28, 12,162.78 and 2,911.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.28 : 12,162.78 = 2,911.56 : x
2. Step 2: Convert to fraction form
   8,105.28/12,162.78 = 2,911.56/x
3. Step 3: Cross multiply
   8,105.28x = 12,162.78 × 2,911.56
4. Step 4: Simplify right side
   8,105.28x = 35,412,663.74
5. Step 5: Solve for x
   x = 35,412,663.74/8,105.28
6. Step 6: Final answer
   x = 4,369.09