Finding the Fourth Proportional to 16,236.72, 22,403.16 and 9,522.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,236.72 : 22,403.16 = 9,522.72 : x
2. Step 2: Convert to fraction form
   16,236.72/22,403.16 = 9,522.72/x
3. Step 3: Cross multiply
   16,236.72x = 22,403.16 × 9,522.72
4. Step 4: Simplify right side
   16,236.72x = 213,339,019.80
5. Step 5: Solve for x
   x = 213,339,019.80/16,236.72
6. Step 6: Final answer
   x = 13,139.29