Finding the Fourth Proportional to 9,321.09, 12,859.83 and 5,542.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.09 : 12,859.83 = 5,542.98 : x
2. Step 2: Convert to fraction form
   9,321.09/12,859.83 = 5,542.98/x
3. Step 3: Cross multiply
   9,321.09x = 12,859.83 × 5,542.98
4. Step 4: Simplify right side
   9,321.09x = 71,281,780.49
5. Step 5: Solve for x
   x = 71,281,780.49/9,321.09
6. Step 6: Final answer
   x = 7,647.37