Finding the Fourth Proportional to 2,380.37, 3,569.58 and 820.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.37 : 3,569.58 = 820.04 : x
2. Step 2: Convert to fraction form
   2,380.37/3,569.58 = 820.04/x
3. Step 3: Cross multiply
   2,380.37x = 3,569.58 × 820.04
4. Step 4: Simplify right side
   2,380.37x = 2,927,180.54
5. Step 5: Solve for x
   x = 2,927,180.54/2,380.37
6. Step 6: Final answer
   x = 1,229.72