Finding the Fourth Proportional to 9,367.67, 12,928.68 and 5,388.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,367.67 : 12,928.68 = 5,388.71 : x
2. Step 2: Convert to fraction form
   9,367.67/12,928.68 = 5,388.71/x
3. Step 3: Cross multiply
   9,367.67x = 12,928.68 × 5,388.71
4. Step 4: Simplify right side
   9,367.67x = 69,668,907.20
5. Step 5: Solve for x
   x = 69,668,907.20/9,367.67
6. Step 6: Final answer
   x = 7,437.16