Finding the Fourth Proportional to 6,086.99, 9,145.07 and 3,899.99

Step by Step Solution

1. Step 1: Write the proportion equation
   6,086.99 : 9,145.07 = 3,899.99 : x
2. Step 2: Convert to fraction form
   6,086.99/9,145.07 = 3,899.99/x
3. Step 3: Cross multiply
   6,086.99x = 9,145.07 × 3,899.99
4. Step 4: Simplify right side
   6,086.99x = 35,665,699.54
5. Step 5: Solve for x
   x = 35,665,699.54/6,086.99
6. Step 6: Final answer
   x = 5,859.33