Finding the Fourth Proportional to 9,867.72, 13,617.30 and 5,391.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,867.72 : 13,617.30 = 5,391.48 : x
2. Step 2: Convert to fraction form
   9,867.72/13,617.30 = 5,391.48/x
3. Step 3: Cross multiply
   9,867.72x = 13,617.30 × 5,391.48
4. Step 4: Simplify right side
   9,867.72x = 73,417,400.60
5. Step 5: Solve for x
   x = 73,417,400.60/9,867.72
6. Step 6: Final answer
   x = 7,440.16