Finding the Fourth Proportional to 10,688.72, 16,022.14 and 5,413.95

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.72 : 16,022.14 = 5,413.95 : x
2. Step 2: Convert to fraction form
   10,688.72/16,022.14 = 5,413.95/x
3. Step 3: Cross multiply
   10,688.72x = 16,022.14 × 5,413.95
4. Step 4: Simplify right side
   10,688.72x = 86,743,051.32
5. Step 5: Solve for x
   x = 86,743,051.32/10,688.72
6. Step 6: Final answer
   x = 8,115.39