Finding the Fourth Proportional to 16,698.57, 23,044.29 and 9,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,698.57 : 23,044.29 = 9,144.78 : x
2. Step 2: Convert to fraction form
   16,698.57/23,044.29 = 9,144.78/x
3. Step 3: Cross multiply
   16,698.57x = 23,044.29 × 9,144.78
4. Step 4: Simplify right side
   16,698.57x = 210,734,962.31
5. Step 5: Solve for x
   x = 210,734,962.31/16,698.57
6. Step 6: Final answer
   x = 12,619.94