Finding the Fourth Proportional to 3,111.89, 4,288.50 and 2,226.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.89 : 4,288.50 = 2,226.15 : x
2. Step 2: Convert to fraction form
   3,111.89/4,288.50 = 2,226.15/x
3. Step 3: Cross multiply
   3,111.89x = 4,288.50 × 2,226.15
4. Step 4: Simplify right side
   3,111.89x = 9,546,849.43
5. Step 5: Solve for x
   x = 9,546,849.43/3,111.89
6. Step 6: Final answer
   x = 3,067.86