Finding the Fourth Proportional to 9,217.86, 12,721.55 and 5,442.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,217.86 : 12,721.55 = 5,442.27 : x
2. Step 2: Convert to fraction form
   9,217.86/12,721.55 = 5,442.27/x
3. Step 3: Cross multiply
   9,217.86x = 12,721.55 × 5,442.27
4. Step 4: Simplify right side
   9,217.86x = 69,234,109.92
5. Step 5: Solve for x
   x = 69,234,109.92/9,217.86
6. Step 6: Final answer
   x = 7,510.87