Finding the Fourth Proportional to 9,330, 12,871.35 and 5,553.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,330 : 12,871.35 = 5,553.42 : x
2. Step 2: Convert to fraction form
   9,330/12,871.35 = 5,553.42/x
3. Step 3: Cross multiply
   9,330x = 12,871.35 × 5,553.42
4. Step 4: Simplify right side
   9,330x = 71,480,012.52
5. Step 5: Solve for x
   x = 71,480,012.52/9,330
6. Step 6: Final answer
   x = 7,661.31