Finding the Fourth Proportional to 3,890.36, 5,810.73 and 3,519.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890.36 : 5,810.73 = 3,519.59 : x
2. Step 2: Convert to fraction form
   3,890.36/5,810.73 = 3,519.59/x
3. Step 3: Cross multiply
   3,890.36x = 5,810.73 × 3,519.59
4. Step 4: Simplify right side
   3,890.36x = 20,451,378.40
5. Step 5: Solve for x
   x = 20,451,378.40/3,890.36
6. Step 6: Final answer
   x = 5,256.94