Finding the Fourth Proportional to 2,016.78, 3,025.78 and 630.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.78 : 3,025.78 = 630.26 : x
2. Step 2: Convert to fraction form
   2,016.78/3,025.78 = 630.26/x
3. Step 3: Cross multiply
   2,016.78x = 3,025.78 × 630.26
4. Step 4: Simplify right side
   2,016.78x = 1,907,028.10
5. Step 5: Solve for x
   x = 1,907,028.10/2,016.78
6. Step 6: Final answer
   x = 945.58