Finding the Fourth Proportional to 12,471.20, 17,210.82 and 7,167.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,471.20 : 17,210.82 = 7,167.68 : x
2. Step 2: Convert to fraction form
   12,471.20/17,210.82 = 7,167.68/x
3. Step 3: Cross multiply
   12,471.20x = 17,210.82 × 7,167.68
4. Step 4: Simplify right side
   12,471.20x = 123,361,650.30
5. Step 5: Solve for x
   x = 123,361,650.30/12,471.20
6. Step 6: Final answer
   x = 9,891.72