Finding the Fourth Proportional to 11,611.92, 17,413.41 and 5,685.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,611.92 : 17,413.41 = 5,685.15 : x
2. Step 2: Convert to fraction form
   11,611.92/17,413.41 = 5,685.15/x
3. Step 3: Cross multiply
   11,611.92x = 17,413.41 × 5,685.15
4. Step 4: Simplify right side
   11,611.92x = 98,997,847.86
5. Step 5: Solve for x
   x = 98,997,847.86/11,611.92
6. Step 6: Final answer
   x = 8,525.54