Finding the Fourth Proportional to 2,485.19, 3,727.94 and 819.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.19 : 3,727.94 = 819.42 : x
2. Step 2: Convert to fraction form
   2,485.19/3,727.94 = 819.42/x
3. Step 3: Cross multiply
   2,485.19x = 3,727.94 × 819.42
4. Step 4: Simplify right side
   2,485.19x = 3,054,744.50
5. Step 5: Solve for x
   x = 3,054,744.50/2,485.19
6. Step 6: Final answer
   x = 1,229.18