Finding the Fourth Proportional to 2,571.55, 3,858.23 and 816.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.55 : 3,858.23 = 816.48 : x
2. Step 2: Convert to fraction form
   2,571.55/3,858.23 = 816.48/x
3. Step 3: Cross multiply
   2,571.55x = 3,858.23 × 816.48
4. Step 4: Simplify right side
   2,571.55x = 3,150,169.67
5. Step 5: Solve for x
   x = 3,150,169.67/2,571.55
6. Step 6: Final answer
   x = 1,225.01