Finding the Fourth Proportional to 16,221, 22,388.24 and 9,147.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,221 : 22,388.24 = 9,147.56 : x
2. Step 2: Convert to fraction form
   16,221/22,388.24 = 9,147.56/x
3. Step 3: Cross multiply
   16,221x = 22,388.24 × 9,147.56
4. Step 4: Simplify right side
   16,221x = 204,797,768.69
5. Step 5: Solve for x
   x = 204,797,768.69/16,221
6. Step 6: Final answer
   x = 12,625.47