Finding the Fourth Proportional to 1,024.38, 1,413.27 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,024.38 : 1,413.27 = 630.72 : x
2. Step 2: Convert to fraction form
   1,024.38/1,413.27 = 630.72/x
3. Step 3: Cross multiply
   1,024.38x = 1,413.27 × 630.72
4. Step 4: Simplify right side
   1,024.38x = 891,377.65
5. Step 5: Solve for x
   x = 891,377.65/1,024.38
6. Step 6: Final answer
   x = 870.16