Finding the Fourth Proportional to 9,330.72, 12,874.32 and 5,553.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,330.72 : 12,874.32 = 5,553.60 : x
2. Step 2: Convert to fraction form
   9,330.72/12,874.32 = 5,553.60/x
3. Step 3: Cross multiply
   9,330.72x = 12,874.32 × 5,553.60
4. Step 4: Simplify right side
   9,330.72x = 71,498,823.55
5. Step 5: Solve for x
   x = 71,498,823.55/9,330.72
6. Step 6: Final answer
   x = 7,662.73