Finding the Fourth Proportional to 16,200, 22,365.72 and 10,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,200 : 22,365.72 = 10,620.72 : x
2. Step 2: Convert to fraction form
   16,200/22,365.72 = 10,620.72/x
3. Step 3: Cross multiply
   16,200x = 22,365.72 × 10,620.72
4. Step 4: Simplify right side
   16,200x = 237,540,049.72
5. Step 5: Solve for x
   x = 237,540,049.72/16,200
6. Step 6: Final answer
   x = 14,662.97