Finding the Fourth Proportional to 9,664.82, 13,337.78 and 9,221.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,664.82 : 13,337.78 = 9,221.96 : x
2. Step 2: Convert to fraction form
   9,664.82/13,337.78 = 9,221.96/x
3. Step 3: Cross multiply
   9,664.82x = 13,337.78 × 9,221.96
4. Step 4: Simplify right side
   9,664.82x = 123,000,430.01
5. Step 5: Solve for x
   x = 123,000,430.01/9,664.82
6. Step 6: Final answer
   x = 12,726.61