Finding the Fourth Proportional to 8,964.56, 12,371.82 and 5,239.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,964.56 : 12,371.82 = 5,239.28 : x
2. Step 2: Convert to fraction form
   8,964.56/12,371.82 = 5,239.28/x
3. Step 3: Cross multiply
   8,964.56x = 12,371.82 × 5,239.28
4. Step 4: Simplify right side
   8,964.56x = 64,819,440.37
5. Step 5: Solve for x
   x = 64,819,440.37/8,964.56
6. Step 6: Final answer
   x = 7,230.63