Finding the Fourth Proportional to 9,311.56, 12,849.58 and 5,119.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,311.56 : 12,849.58 = 5,119.76 : x
2. Step 2: Convert to fraction form
   9,311.56/12,849.58 = 5,119.76/x
3. Step 3: Cross multiply
   9,311.56x = 12,849.58 × 5,119.76
4. Step 4: Simplify right side
   9,311.56x = 65,786,765.70
5. Step 5: Solve for x
   x = 65,786,765.70/9,311.56
6. Step 6: Final answer
   x = 7,065.06