Finding the Fourth Proportional to 1,413.38, 1,950.46 and 861.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,413.38 : 1,950.46 = 861.38 : x
2. Step 2: Convert to fraction form
   1,413.38/1,950.46 = 861.38/x
3. Step 3: Cross multiply
   1,413.38x = 1,950.46 × 861.38
4. Step 4: Simplify right side
   1,413.38x = 1,680,075.33
5. Step 5: Solve for x
   x = 1,680,075.33/1,413.38
6. Step 6: Final answer
   x = 1,188.70