Finding the Fourth Proportional to 2,016.20, 3,024.78 and 845.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.20 : 3,024.78 = 845.55 : x
2. Step 2: Convert to fraction form
   2,016.20/3,024.78 = 845.55/x
3. Step 3: Cross multiply
   2,016.20x = 3,024.78 × 845.55
4. Step 4: Simplify right side
   2,016.20x = 2,557,602.73
5. Step 5: Solve for x
   x = 2,557,602.73/2,016.20
6. Step 6: Final answer
   x = 1,268.53