Finding the Fourth Proportional to 16,272, 22,458.72 and 9,198.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,272 : 22,458.72 = 9,198.72 : x
2. Step 2: Convert to fraction form
   16,272/22,458.72 = 9,198.72/x
3. Step 3: Cross multiply
   16,272x = 22,458.72 × 9,198.72
4. Step 4: Simplify right side
   16,272x = 206,591,476.84
5. Step 5: Solve for x
   x = 206,591,476.84/16,272
6. Step 6: Final answer
   x = 12,696.13