Finding the Fourth Proportional to 13,997, 20,995.56 and 3,608.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,997 : 20,995.56 = 3,608.72 : x
2. Step 2: Convert to fraction form
   13,997/20,995.56 = 3,608.72/x
3. Step 3: Cross multiply
   13,997x = 20,995.56 × 3,608.72
4. Step 4: Simplify right side
   13,997x = 75,767,097.28
5. Step 5: Solve for x
   x = 75,767,097.28/13,997
6. Step 6: Final answer
   x = 5,413.10