Finding the Fourth Proportional to 9,665.48, 13,344.78 and 7,423.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,665.48 : 13,344.78 = 7,423.35 : x
2. Step 2: Convert to fraction form
   9,665.48/13,344.78 = 7,423.35/x
3. Step 3: Cross multiply
   9,665.48x = 13,344.78 × 7,423.35
4. Step 4: Simplify right side
   9,665.48x = 99,062,905.89
5. Step 5: Solve for x
   x = 99,062,905.89/9,665.48
6. Step 6: Final answer
   x = 10,249.15