Finding the Fourth Proportional to 3,413.16, 5,112.18 and 2,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,413.16 : 5,112.18 = 2,111.76 : x
2. Step 2: Convert to fraction form
   3,413.16/5,112.18 = 2,111.76/x
3. Step 3: Cross multiply
   3,413.16x = 5,112.18 × 2,111.76
4. Step 4: Simplify right side
   3,413.16x = 10,795,697.24
5. Step 5: Solve for x
   x = 10,795,697.24/3,413.16
6. Step 6: Final answer
   x = 3,162.96