Finding the Fourth Proportional to 9,608.80, 13,259.89 and 5,359.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,608.80 : 13,259.89 = 5,359.99 : x
2. Step 2: Convert to fraction form
   9,608.80/13,259.89 = 5,359.99/x
3. Step 3: Cross multiply
   9,608.80x = 13,259.89 × 5,359.99
4. Step 4: Simplify right side
   9,608.80x = 71,072,877.80
5. Step 5: Solve for x
   x = 71,072,877.80/9,608.80
6. Step 6: Final answer
   x = 7,396.64