Finding the Fourth Proportional to 9,687.27, 13,369.85 and 5,440.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.27 : 13,369.85 = 5,440.09 : x
2. Step 2: Convert to fraction form
   9,687.27/13,369.85 = 5,440.09/x
3. Step 3: Cross multiply
   9,687.27x = 13,369.85 × 5,440.09
4. Step 4: Simplify right side
   9,687.27x = 72,733,187.29
5. Step 5: Solve for x
   x = 72,733,187.29/9,687.27
6. Step 6: Final answer
   x = 7,508.12