Finding the Fourth Proportional to 3,111.42, 4,289.97 and 2,168.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,111.42 : 4,289.97 = 2,168.04 : x
2. Step 2: Convert to fraction form
   3,111.42/4,289.97 = 2,168.04/x
3. Step 3: Cross multiply
   3,111.42x = 4,289.97 × 2,168.04
4. Step 4: Simplify right side
   3,111.42x = 9,300,826.56
5. Step 5: Solve for x
   x = 9,300,826.56/3,111.42
6. Step 6: Final answer
   x = 2,989.25