Finding the Fourth Proportional to 2,112.48, 3,168.72 and 942.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.48 : 3,168.72 = 942.18 : x
2. Step 2: Convert to fraction form
   2,112.48/3,168.72 = 942.18/x
3. Step 3: Cross multiply
   2,112.48x = 3,168.72 × 942.18
4. Step 4: Simplify right side
   2,112.48x = 2,985,504.61
5. Step 5: Solve for x
   x = 2,985,504.61/2,112.48
6. Step 6: Final answer
   x = 1,413.27