Finding the Fourth Proportional to 9,578.38, 13,226.88 and 7,216.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,578.38 : 13,226.88 = 7,216.42 : x
2. Step 2: Convert to fraction form
   9,578.38/13,226.88 = 7,216.42/x
3. Step 3: Cross multiply
   9,578.38x = 13,226.88 × 7,216.42
4. Step 4: Simplify right side
   9,578.38x = 95,450,721.37
5. Step 5: Solve for x
   x = 95,450,721.37/9,578.38
6. Step 6: Final answer
   x = 9,965.23