Finding the Fourth Proportional to 2,485.57, 3,727.56 and 819.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.57 : 3,727.56 = 819.38 : x
2. Step 2: Convert to fraction form
   2,485.57/3,727.56 = 819.38/x
3. Step 3: Cross multiply
   2,485.57x = 3,727.56 × 819.38
4. Step 4: Simplify right side
   2,485.57x = 3,054,292.76
5. Step 5: Solve for x
   x = 3,054,292.76/2,485.57
6. Step 6: Final answer
   x = 1,228.81