Finding the Fourth Proportional to 3,105.69, 4,284.80 and 2,109.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.69 : 4,284.80 = 2,109.23 : x
2. Step 2: Convert to fraction form
   3,105.69/4,284.80 = 2,109.23/x
3. Step 3: Cross multiply
   3,105.69x = 4,284.80 × 2,109.23
4. Step 4: Simplify right side
   3,105.69x = 9,037,628.70
5. Step 5: Solve for x
   x = 9,037,628.70/3,105.69
6. Step 6: Final answer
   x = 2,910.02