Finding the Fourth Proportional to 9,744.48, 13,446.72 and 5,551.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,744.48 : 13,446.72 = 5,551.20 : x
2. Step 2: Convert to fraction form
   9,744.48/13,446.72 = 5,551.20/x
3. Step 3: Cross multiply
   9,744.48x = 13,446.72 × 5,551.20
4. Step 4: Simplify right side
   9,744.48x = 74,645,432.06
5. Step 5: Solve for x
   x = 74,645,432.06/9,744.48
6. Step 6: Final answer
   x = 7,660.28