Finding the Fourth Proportional to 3,105.95, 4,285.91 and 2,517.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.95 : 4,285.91 = 2,517.89 : x
2. Step 2: Convert to fraction form
   3,105.95/4,285.91 = 2,517.89/x
3. Step 3: Cross multiply
   3,105.95x = 4,285.91 × 2,517.89
4. Step 4: Simplify right side
   3,105.95x = 10,791,434.80
5. Step 5: Solve for x
   x = 10,791,434.80/3,105.95
6. Step 6: Final answer
   x = 3,474.44