Finding the Fourth Proportional to 9,321.74, 12,859.76 and 5,542.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.74 : 12,859.76 = 5,542.76 : x
2. Step 2: Convert to fraction form
   9,321.74/12,859.76 = 5,542.76/x
3. Step 3: Cross multiply
   9,321.74x = 12,859.76 × 5,542.76
4. Step 4: Simplify right side
   9,321.74x = 71,278,563.34
5. Step 5: Solve for x
   x = 71,278,563.34/9,321.74
6. Step 6: Final answer
   x = 7,646.49