Finding the Fourth Proportional to 2,285.34, 3,428.52 and 804.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,285.34 : 3,428.52 = 804.78 : x
2. Step 2: Convert to fraction form
   2,285.34/3,428.52 = 804.78/x
3. Step 3: Cross multiply
   2,285.34x = 3,428.52 × 804.78
4. Step 4: Simplify right side
   2,285.34x = 2,759,204.33
5. Step 5: Solve for x
   x = 2,759,204.33/2,285.34
6. Step 6: Final answer
   x = 1,207.35