Finding the Fourth Proportional to 9,760.80, 13,469.91 and 5,284.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,760.80 : 13,469.91 = 5,284.59 : x
2. Step 2: Convert to fraction form
   9,760.80/13,469.91 = 5,284.59/x
3. Step 3: Cross multiply
   9,760.80x = 13,469.91 × 5,284.59
4. Step 4: Simplify right side
   9,760.80x = 71,182,951.69
5. Step 5: Solve for x
   x = 71,182,951.69/9,760.80
6. Step 6: Final answer
   x = 7,292.74