Finding the Fourth Proportional to 9,369.52, 12,928.62 and 5,389.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,369.52 : 12,928.62 = 5,389.18 : x
2. Step 2: Convert to fraction form
   9,369.52/12,928.62 = 5,389.18/x
3. Step 3: Cross multiply
   9,369.52x = 12,928.62 × 5,389.18
4. Step 4: Simplify right side
   9,369.52x = 69,674,660.33
5. Step 5: Solve for x
   x = 69,674,660.33/9,369.52
6. Step 6: Final answer
   x = 7,436.31