Finding the Fourth Proportional to 3,918.78, 5,879.58 and 1,727.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,918.78 : 5,879.58 = 1,727.25 : x
2. Step 2: Convert to fraction form
   3,918.78/5,879.58 = 1,727.25/x
3. Step 3: Cross multiply
   3,918.78x = 5,879.58 × 1,727.25
4. Step 4: Simplify right side
   3,918.78x = 10,155,504.56
5. Step 5: Solve for x
   x = 10,155,504.56/3,918.78
6. Step 6: Final answer
   x = 2,591.50