Finding the Fourth Proportional to 9,945.04, 13,724.28 and 5,469.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.04 : 13,724.28 = 5,469.28 : x
2. Step 2: Convert to fraction form
   9,945.04/13,724.28 = 5,469.28/x
3. Step 3: Cross multiply
   9,945.04x = 13,724.28 × 5,469.28
4. Step 4: Simplify right side
   9,945.04x = 75,061,930.12
5. Step 5: Solve for x
   x = 75,061,930.12/9,945.04
6. Step 6: Final answer
   x = 7,547.68