Finding the Fourth Proportional to 8,105.15, 12,150.43 and 2,909.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.15 : 12,150.43 = 2,909.81 : x
2. Step 2: Convert to fraction form
   8,105.15/12,150.43 = 2,909.81/x
3. Step 3: Cross multiply
   8,105.15x = 12,150.43 × 2,909.81
4. Step 4: Simplify right side
   8,105.15x = 35,355,374.69
5. Step 5: Solve for x
   x = 35,355,374.69/8,105.15
6. Step 6: Final answer
   x = 4,362.09