Finding the Fourth Proportional to 9,321.30, 12,860.62 and 5,542.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.30 : 12,860.62 = 5,542.54 : x
2. Step 2: Convert to fraction form
   9,321.30/12,860.62 = 5,542.54/x
3. Step 3: Cross multiply
   9,321.30x = 12,860.62 × 5,542.54
4. Step 4: Simplify right side
   9,321.30x = 71,280,500.77
5. Step 5: Solve for x
   x = 71,280,500.77/9,321.30
6. Step 6: Final answer
   x = 7,647.06