Finding the Fourth Proportional to 9,336.62, 12,884.67 and 5,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,336.62 : 12,884.67 = 5,144.78 : x
2. Step 2: Convert to fraction form
   9,336.62/12,884.67 = 5,144.78/x
3. Step 3: Cross multiply
   9,336.62x = 12,884.67 × 5,144.78
4. Step 4: Simplify right side
   9,336.62x = 66,288,792.52
5. Step 5: Solve for x
   x = 66,288,792.52/9,336.62
6. Step 6: Final answer
   x = 7,099.87