Finding the Fourth Proportional to 9,333.46, 12,880.44 and 5,355.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,333.46 : 12,880.44 = 5,355.28 : x
2. Step 2: Convert to fraction form
   9,333.46/12,880.44 = 5,355.28/x
3. Step 3: Cross multiply
   9,333.46x = 12,880.44 × 5,355.28
4. Step 4: Simplify right side
   9,333.46x = 68,978,362.72
5. Step 5: Solve for x
   x = 68,978,362.72/9,333.46
6. Step 6: Final answer
   x = 7,390.44