Finding the Fourth Proportional to 9,366.30, 12,928.10 and 5,388.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,366.30 : 12,928.10 = 5,388.69 : x
2. Step 2: Convert to fraction form
   9,366.30/12,928.10 = 5,388.69/x
3. Step 3: Cross multiply
   9,366.30x = 12,928.10 × 5,388.69
4. Step 4: Simplify right side
   9,366.30x = 69,665,496.25
5. Step 5: Solve for x
   x = 69,665,496.25/9,366.30
6. Step 6: Final answer
   x = 7,437.89