Finding the Fourth Proportional to 9,310.71, 12,849.57 and 5,119.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,310.71 : 12,849.57 = 5,119.77 : x
2. Step 2: Convert to fraction form
   9,310.71/12,849.57 = 5,119.77/x
3. Step 3: Cross multiply
   9,310.71x = 12,849.57 × 5,119.77
4. Step 4: Simplify right side
   9,310.71x = 65,786,843.00
5. Step 5: Solve for x
   x = 65,786,843.00/9,310.71
6. Step 6: Final answer
   x = 7,065.72