Finding the Fourth Proportional to 9,867.82, 13,617.86 and 5,391.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,867.82 : 13,617.86 = 5,391.82 : x
2. Step 2: Convert to fraction form
   9,867.82/13,617.86 = 5,391.82/x
3. Step 3: Cross multiply
   9,867.82x = 13,617.86 × 5,391.82
4. Step 4: Simplify right side
   9,867.82x = 73,425,049.91
5. Step 5: Solve for x
   x = 73,425,049.91/9,867.82
6. Step 6: Final answer
   x = 7,440.86