Finding the Fourth Proportional to 9,945.41, 13,724.69 and 5,469.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.41 : 13,724.69 = 5,469.21 : x
2. Step 2: Convert to fraction form
   9,945.41/13,724.69 = 5,469.21/x
3. Step 3: Cross multiply
   9,945.41x = 13,724.69 × 5,469.21
4. Step 4: Simplify right side
   9,945.41x = 75,063,184.45
5. Step 5: Solve for x
   x = 75,063,184.45/9,945.41
6. Step 6: Final answer
   x = 7,547.52