Finding the Fourth Proportional to 1,023.83, 1,413.24 and 630.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,023.83 : 1,413.24 = 630.89 : x
2. Step 2: Convert to fraction form
   1,023.83/1,413.24 = 630.89/x
3. Step 3: Cross multiply
   1,023.83x = 1,413.24 × 630.89
4. Step 4: Simplify right side
   1,023.83x = 891,598.98
5. Step 5: Solve for x
   x = 891,598.98/1,023.83
6. Step 6: Final answer
   x = 870.85