Finding the Fourth Proportional to 2,379.82, 3,569.50 and 819.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.82 : 3,569.50 = 819.76 : x
2. Step 2: Convert to fraction form
   2,379.82/3,569.50 = 819.76/x
3. Step 3: Cross multiply
   2,379.82x = 3,569.50 × 819.76
4. Step 4: Simplify right side
   2,379.82x = 2,926,133.32
5. Step 5: Solve for x
   x = 2,926,133.32/2,379.82
6. Step 6: Final answer
   x = 1,229.56