Finding the Fourth Proportional to 12,218.24, 16,860.72 and 6,629.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,218.24 : 16,860.72 = 6,629.12 : x
2. Step 2: Convert to fraction form
   12,218.24/16,860.72 = 6,629.12/x
3. Step 3: Cross multiply
   12,218.24x = 16,860.72 × 6,629.12
4. Step 4: Simplify right side
   12,218.24x = 111,771,736.17
5. Step 5: Solve for x
   x = 111,771,736.17/12,218.24
6. Step 6: Final answer
   x = 9,147.94