Finding the Fourth Proportional to 9,247.97, 12,764.57 and 5,709.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,247.97 : 12,764.57 = 5,709.15 : x
2. Step 2: Convert to fraction form
   9,247.97/12,764.57 = 5,709.15/x
3. Step 3: Cross multiply
   9,247.97x = 12,764.57 × 5,709.15
4. Step 4: Simplify right side
   9,247.97x = 72,874,816.27
5. Step 5: Solve for x
   x = 72,874,816.27/9,247.97
6. Step 6: Final answer
   x = 7,880.09