Finding the Fourth Proportional to 9,867.46, 13,618.04 and 5,391.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,867.46 : 13,618.04 = 5,391.89 : x
2. Step 2: Convert to fraction form
   9,867.46/13,618.04 = 5,391.89/x
3. Step 3: Cross multiply
   9,867.46x = 13,618.04 × 5,391.89
4. Step 4: Simplify right side
   9,867.46x = 73,426,973.70
5. Step 5: Solve for x
   x = 73,426,973.70/9,867.46
6. Step 6: Final answer
   x = 7,441.32