Finding the Fourth Proportional to 9,945.71, 13,724.90 and 5,469.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.71 : 13,724.90 = 5,469.47 : x
2. Step 2: Convert to fraction form
   9,945.71/13,724.90 = 5,469.47/x
3. Step 3: Cross multiply
   9,945.71x = 13,724.90 × 5,469.47
4. Step 4: Simplify right side
   9,945.71x = 75,067,956.28
5. Step 5: Solve for x
   x = 75,067,956.28/9,945.71
6. Step 6: Final answer
   x = 7,547.77