Finding the Fourth Proportional to 22,605.16, 31,196.82 and 13,171.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,605.16 : 31,196.82 = 13,171.72 : x
2. Step 2: Convert to fraction form
   22,605.16/31,196.82 = 13,171.72/x
3. Step 3: Cross multiply
   22,605.16x = 31,196.82 × 13,171.72
4. Step 4: Simplify right side
   22,605.16x = 410,915,777.93
5. Step 5: Solve for x
   x = 410,915,777.93/22,605.16
6. Step 6: Final answer
   x = 18,177.96