Finding the Fourth Proportional to 2,790.32, 4,186.38 and 942.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,790.32 : 4,186.38 = 942.28 : x
2. Step 2: Convert to fraction form
   2,790.32/4,186.38 = 942.28/x
3. Step 3: Cross multiply
   2,790.32x = 4,186.38 × 942.28
4. Step 4: Simplify right side
   2,790.32x = 3,944,742.15
5. Step 5: Solve for x
   x = 3,944,742.15/2,790.32
6. Step 6: Final answer
   x = 1,413.72