Finding the Fourth Proportional to 12,844.12, 17,717.25 and 8,120.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,844.12 : 17,717.25 = 8,120.20 : x
2. Step 2: Convert to fraction form
   12,844.12/17,717.25 = 8,120.20/x
3. Step 3: Cross multiply
   12,844.12x = 17,717.25 × 8,120.20
4. Step 4: Simplify right side
   12,844.12x = 143,867,613.45
5. Step 5: Solve for x
   x = 143,867,613.45/12,844.12
6. Step 6: Final answer
   x = 11,201.05