Finding the Fourth Proportional to 2,574.66, 3,860.52 and 819.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.66 : 3,860.52 = 819.33 : x
2. Step 2: Convert to fraction form
   2,574.66/3,860.52 = 819.33/x
3. Step 3: Cross multiply
   2,574.66x = 3,860.52 × 819.33
4. Step 4: Simplify right side
   2,574.66x = 3,163,039.85
5. Step 5: Solve for x
   x = 3,163,039.85/2,574.66
6. Step 6: Final answer
   x = 1,228.53