Finding the Fourth Proportional to 21,328.68, 31,992.72 and 9,633.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,328.68 : 31,992.72 = 9,633.72 : x
2. Step 2: Convert to fraction form
   21,328.68/31,992.72 = 9,633.72/x
3. Step 3: Cross multiply
   21,328.68x = 31,992.72 × 9,633.72
4. Step 4: Simplify right side
   21,328.68x = 308,208,906.52
5. Step 5: Solve for x
   x = 308,208,906.52/21,328.68
6. Step 6: Final answer
   x = 14,450.44