Finding the Fourth Proportional to 9,728.22, 13,424.49 and 5,479.32

Step by Step Solution

1. Step 1: Write the proportion equation
   9,728.22 : 13,424.49 = 5,479.32 : x
2. Step 2: Convert to fraction form
   9,728.22/13,424.49 = 5,479.32/x
3. Step 3: Cross multiply
   9,728.22x = 13,424.49 × 5,479.32
4. Step 4: Simplify right side
   9,728.22x = 73,557,076.55
5. Step 5: Solve for x
   x = 73,557,076.55/9,728.22
6. Step 6: Final answer
   x = 7,561.21