Finding the Fourth Proportional to 21,914.72, 30,233.02 and 13,413.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,914.72 : 30,233.02 = 13,413.64 : x
2. Step 2: Convert to fraction form
   21,914.72/30,233.02 = 13,413.64/x
3. Step 3: Cross multiply
   21,914.72x = 30,233.02 × 13,413.64
4. Step 4: Simplify right side
   21,914.72x = 405,534,846.39
5. Step 5: Solve for x
   x = 405,534,846.39/21,914.72
6. Step 6: Final answer
   x = 18,505.13