Finding the Fourth Proportional to 9,945.67, 13,725.12 and 5,469.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.67 : 13,725.12 = 5,469.45 : x
2. Step 2: Convert to fraction form
   9,945.67/13,725.12 = 5,469.45/x
3. Step 3: Cross multiply
   9,945.67x = 13,725.12 × 5,469.45
4. Step 4: Simplify right side
   9,945.67x = 75,068,857.58
5. Step 5: Solve for x
   x = 75,068,857.58/9,945.67
6. Step 6: Final answer
   x = 7,547.89