Finding the Fourth Proportional to 9,728.67, 13,424.81 and 5,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,728.67 : 13,424.81 = 5,479.50 : x
2. Step 2: Convert to fraction form
   9,728.67/13,424.81 = 5,479.50/x
3. Step 3: Cross multiply
   9,728.67x = 13,424.81 × 5,479.50
4. Step 4: Simplify right side
   9,728.67x = 73,561,219.00
5. Step 5: Solve for x
   x = 73,561,219.00/9,728.67
6. Step 6: Final answer
   x = 7,561.28