Finding the Fourth Proportional to 22,185.59, 30,616.43 and 13,238.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,185.59 : 30,616.43 = 13,238.28 : x
2. Step 2: Convert to fraction form
   22,185.59/30,616.43 = 13,238.28/x
3. Step 3: Cross multiply
   22,185.59x = 30,616.43 × 13,238.28
4. Step 4: Simplify right side
   22,185.59x = 405,308,806.75
5. Step 5: Solve for x
   x = 405,308,806.75/22,185.59
6. Step 6: Final answer
   x = 18,269.02