Finding the Fourth Proportional to 9,945.57, 13,724.93 and 5,469.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.57 : 13,724.93 = 5,469.61 : x
2. Step 2: Convert to fraction form
   9,945.57/13,724.93 = 5,469.61/x
3. Step 3: Cross multiply
   9,945.57x = 13,724.93 × 5,469.61
4. Step 4: Simplify right side
   9,945.57x = 75,070,014.38
5. Step 5: Solve for x
   x = 75,070,014.38/9,945.57
6. Step 6: Final answer
   x = 7,548.09