Finding the Fourth Proportional to 16,698.42, 23,042.97 and 9,143.37

Step by Step Solution

1. Step 1: Write the proportion equation
   16,698.42 : 23,042.97 = 9,143.37 : x
2. Step 2: Convert to fraction form
   16,698.42/23,042.97 = 9,143.37/x
3. Step 3: Cross multiply
   16,698.42x = 23,042.97 × 9,143.37
4. Step 4: Simplify right side
   16,698.42x = 210,690,400.61
5. Step 5: Solve for x
   x = 210,690,400.61/16,698.42
6. Step 6: Final answer
   x = 12,617.39