Finding the Fourth Proportional to 16,771.54, 23,145.33 and 9,218.71

Step by Step Solution

1. Step 1: Write the proportion equation
   16,771.54 : 23,145.33 = 9,218.71 : x
2. Step 2: Convert to fraction form
   16,771.54/23,145.33 = 9,218.71/x
3. Step 3: Cross multiply
   16,771.54x = 23,145.33 × 9,218.71
4. Step 4: Simplify right side
   16,771.54x = 213,370,085.12
5. Step 5: Solve for x
   x = 213,370,085.12/16,771.54
6. Step 6: Final answer
   x = 12,722.15