Finding the Fourth Proportional to 9,605.72, 14,383.34 and 7,721.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,605.72 : 14,383.34 = 7,721.61 : x
2. Step 2: Convert to fraction form
   9,605.72/14,383.34 = 7,721.61/x
3. Step 3: Cross multiply
   9,605.72x = 14,383.34 × 7,721.61
4. Step 4: Simplify right side
   9,605.72x = 111,062,503.37
5. Step 5: Solve for x
   x = 111,062,503.37/9,605.72
6. Step 6: Final answer
   x = 11,562.13