Finding the Fourth Proportional to 9,392.85, 12,960.87 and 5,616.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,392.85 : 12,960.87 = 5,616.42 : x
2. Step 2: Convert to fraction form
   9,392.85/12,960.87 = 5,616.42/x
3. Step 3: Cross multiply
   9,392.85x = 12,960.87 × 5,616.42
4. Step 4: Simplify right side
   9,392.85x = 72,793,689.49
5. Step 5: Solve for x
   x = 72,793,689.49/9,392.85
6. Step 6: Final answer
   x = 7,749.90