Finding the Fourth Proportional to 1,040.72, 1,563.30 and 630.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.72 : 1,563.30 = 630.05 : x
2. Step 2: Convert to fraction form
   1,040.72/1,563.30 = 630.05/x
3. Step 3: Cross multiply
   1,040.72x = 1,563.30 × 630.05
4. Step 4: Simplify right side
   1,040.72x = 984,949.35
5. Step 5: Solve for x
   x = 984,949.35/1,040.72
6. Step 6: Final answer
   x = 946.42