Finding the Fourth Proportional to 2,571.94, 3,856.12 and 816.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.94 : 3,856.12 = 816.37 : x
2. Step 2: Convert to fraction form
   2,571.94/3,856.12 = 816.37/x
3. Step 3: Cross multiply
   2,571.94x = 3,856.12 × 816.37
4. Step 4: Simplify right side
   2,571.94x = 3,148,020.68
5. Step 5: Solve for x
   x = 3,148,020.68/2,571.94
6. Step 6: Final answer
   x = 1,223.99