Finding the Fourth Proportional to 9,945.39, 13,724.68 and 5,469.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.39 : 13,724.68 = 5,469.42 : x
2. Step 2: Convert to fraction form
   9,945.39/13,724.68 = 5,469.42/x
3. Step 3: Cross multiply
   9,945.39x = 13,724.68 × 5,469.42
4. Step 4: Simplify right side
   9,945.39x = 75,066,039.29
5. Step 5: Solve for x
   x = 75,066,039.29/9,945.39
6. Step 6: Final answer
   x = 7,547.83