Finding the Fourth Proportional to 9,641.54, 13,304.79 and 5,391.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,641.54 : 13,304.79 = 5,391.74 : x
2. Step 2: Convert to fraction form
   9,641.54/13,304.79 = 5,391.74/x
3. Step 3: Cross multiply
   9,641.54x = 13,304.79 × 5,391.74
4. Step 4: Simplify right side
   9,641.54x = 71,736,021.92
5. Step 5: Solve for x
   x = 71,736,021.92/9,641.54
6. Step 6: Final answer
   x = 7,440.31