Finding the Fourth Proportional to 9,333.52, 12,880.55 and 5,355.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,333.52 : 12,880.55 = 5,355.88 : x
2. Step 2: Convert to fraction form
   9,333.52/12,880.55 = 5,355.88/x
3. Step 3: Cross multiply
   9,333.52x = 12,880.55 × 5,355.88
4. Step 4: Simplify right side
   9,333.52x = 68,986,588.95
5. Step 5: Solve for x
   x = 68,986,588.95/9,333.52
6. Step 6: Final answer
   x = 7,391.28