Finding the Fourth Proportional to 1,413.78, 1,951.79 and 942.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.78 : 1,951.79 = 942.31 : x
2. Step 2: Convert to fraction form
   1,413.78/1,951.79 = 942.31/x
3. Step 3: Cross multiply
   1,413.78x = 1,951.79 × 942.31
4. Step 4: Simplify right side
   1,413.78x = 1,839,191.23
5. Step 5: Solve for x
   x = 1,839,191.23/1,413.78
6. Step 6: Final answer
   x = 1,300.90