Finding the Fourth Proportional to 8,105.09, 12,150.42 and 3,178.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.09 : 12,150.42 = 3,178.16 : x
2. Step 2: Convert to fraction form
   8,105.09/12,150.42 = 3,178.16/x
3. Step 3: Cross multiply
   8,105.09x = 12,150.42 × 3,178.16
4. Step 4: Simplify right side
   8,105.09x = 38,615,978.83
5. Step 5: Solve for x
   x = 38,615,978.83/8,105.09
6. Step 6: Final answer
   x = 4,764.41