Finding the Fourth Proportional to 8,105.73, 12,157.58 and 2,839.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,105.73 : 12,157.58 = 2,839.78 : x
2. Step 2: Convert to fraction form
   8,105.73/12,157.58 = 2,839.78/x
3. Step 3: Cross multiply
   8,105.73x = 12,157.58 × 2,839.78
4. Step 4: Simplify right side
   8,105.73x = 34,524,838.33
5. Step 5: Solve for x
   x = 34,524,838.33/8,105.73
6. Step 6: Final answer
   x = 4,259.32