Finding the Fourth Proportional to 9,945.45, 13,724.71 and 5,469.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.45 : 13,724.71 = 5,469.19 : x
2. Step 2: Convert to fraction form
   9,945.45/13,724.71 = 5,469.19/x
3. Step 3: Cross multiply
   9,945.45x = 13,724.71 × 5,469.19
4. Step 4: Simplify right side
   9,945.45x = 75,062,998.70
5. Step 5: Solve for x
   x = 75,062,998.70/9,945.45
6. Step 6: Final answer
   x = 7,547.47