Finding the Fourth Proportional to 9,311.28, 12,849.76 and 5,119.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,311.28 : 12,849.76 = 5,119.52 : x
2. Step 2: Convert to fraction form
   9,311.28/12,849.76 = 5,119.52/x
3. Step 3: Cross multiply
   9,311.28x = 12,849.76 × 5,119.52
4. Step 4: Simplify right side
   9,311.28x = 65,784,603.32
5. Step 5: Solve for x
   x = 65,784,603.32/9,311.28
6. Step 6: Final answer
   x = 7,065.04