Finding the Fourth Proportional to 2,379.81, 3,568.83 and 819.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.81 : 3,568.83 = 819.37 : x
2. Step 2: Convert to fraction form
   2,379.81/3,568.83 = 819.37/x
3. Step 3: Cross multiply
   2,379.81x = 3,568.83 × 819.37
4. Step 4: Simplify right side
   2,379.81x = 2,924,192.24
5. Step 5: Solve for x
   x = 2,924,192.24/2,379.81
6. Step 6: Final answer
   x = 1,228.75