Finding the Fourth Proportional to 16,771.98, 23,143.82 and 9,218.22

Step by Step Solution

1. Step 1: Write the proportion equation
   16,771.98 : 23,143.82 = 9,218.22 : x
2. Step 2: Convert to fraction form
   16,771.98/23,143.82 = 9,218.22/x
3. Step 3: Cross multiply
   16,771.98x = 23,143.82 × 9,218.22
4. Step 4: Simplify right side
   16,771.98x = 213,344,824.40
5. Step 5: Solve for x
   x = 213,344,824.40/16,771.98
6. Step 6: Final answer
   x = 12,720.31