Finding the Fourth Proportional to 9,609.59, 13,260.89 and 5,360.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,609.59 : 13,260.89 = 5,360.35 : x
2. Step 2: Convert to fraction form
   9,609.59/13,260.89 = 5,360.35/x
3. Step 3: Cross multiply
   9,609.59x = 13,260.89 × 5,360.35
4. Step 4: Simplify right side
   9,609.59x = 71,083,039.04
5. Step 5: Solve for x
   x = 71,083,039.04/9,609.59
6. Step 6: Final answer
   x = 7,397.10