Finding the Fourth Proportional to 3,111.64, 4,288.15 and 2,225.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.64 : 4,288.15 = 2,225.91 : x
2. Step 2: Convert to fraction form
   3,111.64/4,288.15 = 2,225.91/x
3. Step 3: Cross multiply
   3,111.64x = 4,288.15 × 2,225.91
4. Step 4: Simplify right side
   3,111.64x = 9,545,014.53
5. Step 5: Solve for x
   x = 9,545,014.53/3,111.64
6. Step 6: Final answer
   x = 3,067.52