Finding the Fourth Proportional to 9,945.31, 13,724.90 and 5,469.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.31 : 13,724.90 = 5,469.45 : x
2. Step 2: Convert to fraction form
   9,945.31/13,724.90 = 5,469.45/x
3. Step 3: Cross multiply
   9,945.31x = 13,724.90 × 5,469.45
4. Step 4: Simplify right side
   9,945.31x = 75,067,654.31
5. Step 5: Solve for x
   x = 75,067,654.31/9,945.31
6. Step 6: Final answer
   x = 7,548.05