Finding the Fourth Proportional to 9,217.83, 12,721.49 and 5,442.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,217.83 : 12,721.49 = 5,442.15 : x
2. Step 2: Convert to fraction form
   9,217.83/12,721.49 = 5,442.15/x
3. Step 3: Cross multiply
   9,217.83x = 12,721.49 × 5,442.15
4. Step 4: Simplify right side
   9,217.83x = 69,232,229.59
5. Step 5: Solve for x
   x = 69,232,229.59/9,217.83
6. Step 6: Final answer
   x = 7,510.69