Finding the Fourth Proportional to 3,105.74, 4,281.05 and 2,109.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.74 : 4,281.05 = 2,109.27 : x
2. Step 2: Convert to fraction form
   3,105.74/4,281.05 = 2,109.27/x
3. Step 3: Cross multiply
   3,105.74x = 4,281.05 × 2,109.27
4. Step 4: Simplify right side
   3,105.74x = 9,029,890.33
5. Step 5: Solve for x
   x = 9,029,890.33/3,105.74
6. Step 6: Final answer
   x = 2,907.49