Finding the Fourth Proportional to 8,272.69, 12,403.71 and 5,458.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,272.69 : 12,403.71 = 5,458.27 : x
2. Step 2: Convert to fraction form
   8,272.69/12,403.71 = 5,458.27/x
3. Step 3: Cross multiply
   8,272.69x = 12,403.71 × 5,458.27
4. Step 4: Simplify right side
   8,272.69x = 67,702,811.83
5. Step 5: Solve for x
   x = 67,702,811.83/8,272.69
6. Step 6: Final answer
   x = 8,183.90