Finding the Fourth Proportional to 12,155.15, 18,231.17 and 3,271.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.15 : 18,231.17 = 3,271.22 : x
2. Step 2: Convert to fraction form
   12,155.15/18,231.17 = 3,271.22/x
3. Step 3: Cross multiply
   12,155.15x = 18,231.17 × 3,271.22
4. Step 4: Simplify right side
   12,155.15x = 59,638,128.78
5. Step 5: Solve for x
   x = 59,638,128.78/12,155.15
6. Step 6: Final answer
   x = 4,906.41