Finding the Fourth Proportional to 10,808.72, 16,212.24 and 3,413.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,808.72 : 16,212.24 = 3,413.40 : x
2. Step 2: Convert to fraction form
   10,808.72/16,212.24 = 3,413.40/x
3. Step 3: Cross multiply
   10,808.72x = 16,212.24 × 3,413.40
4. Step 4: Simplify right side
   10,808.72x = 55,338,860.02
5. Step 5: Solve for x
   x = 55,338,860.02/10,808.72
6. Step 6: Final answer
   x = 5,119.83