Finding the Fourth Proportional to 9,768.69, 13,479.91 and 5,789.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,768.69 : 13,479.91 = 5,789.16 : x
2. Step 2: Convert to fraction form
   9,768.69/13,479.91 = 5,789.16/x
3. Step 3: Cross multiply
   9,768.69x = 13,479.91 × 5,789.16
4. Step 4: Simplify right side
   9,768.69x = 78,037,355.78
5. Step 5: Solve for x
   x = 78,037,355.78/9,768.69
6. Step 6: Final answer
   x = 7,988.52