Finding the Fourth Proportional to 8,111.04, 12,168.18 and 3,431.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.04 : 12,168.18 = 3,431.04 : x
2. Step 2: Convert to fraction form
   8,111.04/12,168.18 = 3,431.04/x
3. Step 3: Cross multiply
   8,111.04x = 12,168.18 × 3,431.04
4. Step 4: Simplify right side
   8,111.04x = 41,749,466.68
5. Step 5: Solve for x
   x = 41,749,466.68/8,111.04
6. Step 6: Final answer
   x = 5,147.24