Finding the Fourth Proportional to 2,280.56, 3,420.43 and 819.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,280.56 : 3,420.43 = 819.52 : x
2. Step 2: Convert to fraction form
   2,280.56/3,420.43 = 819.52/x
3. Step 3: Cross multiply
   2,280.56x = 3,420.43 × 819.52
4. Step 4: Simplify right side
   2,280.56x = 2,803,100.19
5. Step 5: Solve for x
   x = 2,803,100.19/2,280.56
6. Step 6: Final answer
   x = 1,229.13