Finding the Fourth Proportional to 3,839.12, 5,760.18 and 3,105.58

Step by Step Solution

1. Step 1: Write the proportion equation
   3,839.12 : 5,760.18 = 3,105.58 : x
2. Step 2: Convert to fraction form
   3,839.12/5,760.18 = 3,105.58/x
3. Step 3: Cross multiply
   3,839.12x = 5,760.18 × 3,105.58
4. Step 4: Simplify right side
   3,839.12x = 17,888,699.80
5. Step 5: Solve for x
   x = 17,888,699.80/3,839.12
6. Step 6: Final answer
   x = 4,659.58