Finding the Fourth Proportional to 9,945.60, 13,724.75 and 5,469.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,945.60 : 13,724.75 = 5,469.30 : x
2. Step 2: Convert to fraction form
   9,945.60/13,724.75 = 5,469.30/x
3. Step 3: Cross multiply
   9,945.60x = 13,724.75 × 5,469.30
4. Step 4: Simplify right side
   9,945.60x = 75,064,775.18
5. Step 5: Solve for x
   x = 75,064,775.18/9,945.60
6. Step 6: Final answer
   x = 7,547.54