Finding the Fourth Proportional to 9,945.76, 13,725.04 and 5,469.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.76 : 13,725.04 = 5,469.80 : x
2. Step 2: Convert to fraction form
   9,945.76/13,725.04 = 5,469.80/x
3. Step 3: Cross multiply
   9,945.76x = 13,725.04 × 5,469.80
4. Step 4: Simplify right side
   9,945.76x = 75,073,223.79
5. Step 5: Solve for x
   x = 75,073,223.79/9,945.76
6. Step 6: Final answer
   x = 7,548.26