Finding the Fourth Proportional to 12,704.09, 19,057.98 and 3,939.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,704.09 : 19,057.98 = 3,939.71 : x
2. Step 2: Convert to fraction form
   12,704.09/19,057.98 = 3,939.71/x
3. Step 3: Cross multiply
   12,704.09x = 19,057.98 × 3,939.71
4. Step 4: Simplify right side
   12,704.09x = 75,082,914.39
5. Step 5: Solve for x
   x = 75,082,914.39/12,704.09
6. Step 6: Final answer
   x = 5,910.14