Finding the Fourth Proportional to 16,239.72, 22,403.67 and 9,521.94

Step by Step Solution

1. Step 1: Write the proportion equation
   16,239.72 : 22,403.67 = 9,521.94 : x
2. Step 2: Convert to fraction form
   16,239.72/22,403.67 = 9,521.94/x
3. Step 3: Cross multiply
   16,239.72x = 22,403.67 × 9,521.94
4. Step 4: Simplify right side
   16,239.72x = 213,326,401.52
5. Step 5: Solve for x
   x = 213,326,401.52/16,239.72
6. Step 6: Final answer
   x = 13,136.09