Finding the Fourth Proportional to 3,111.76, 4,288.32 and 2,226.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.76 : 4,288.32 = 2,226.03 : x
2. Step 2: Convert to fraction form
   3,111.76/4,288.32 = 2,226.03/x
3. Step 3: Cross multiply
   3,111.76x = 4,288.32 × 2,226.03
4. Step 4: Simplify right side
   3,111.76x = 9,545,912.89
5. Step 5: Solve for x
   x = 9,545,912.89/3,111.76
6. Step 6: Final answer
   x = 3,067.69