Finding the Fourth Proportional to 3,105.56, 4,288.20 and 2,114.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,105.56 : 4,288.20 = 2,114.12 : x
2. Step 2: Convert to fraction form
   3,105.56/4,288.20 = 2,114.12/x
3. Step 3: Cross multiply
   3,105.56x = 4,288.20 × 2,114.12
4. Step 4: Simplify right side
   3,105.56x = 9,065,769.38
5. Step 5: Solve for x
   x = 9,065,769.38/3,105.56
6. Step 6: Final answer
   x = 2,919.21