Finding the Fourth Proportional to 9,608.54, 13,259.78 and 5,416.79

Step by Step Solution

1. Step 1: Write the proportion equation
   9,608.54 : 13,259.78 = 5,416.79 : x
2. Step 2: Convert to fraction form
   9,608.54/13,259.78 = 5,416.79/x
3. Step 3: Cross multiply
   9,608.54x = 13,259.78 × 5,416.79
4. Step 4: Simplify right side
   9,608.54x = 71,825,350.32
5. Step 5: Solve for x
   x = 71,825,350.32/9,608.54
6. Step 6: Final answer
   x = 7,475.16