Finding the Fourth Proportional to 14,144.50, 19,520.22 and 7,857.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,144.50 : 19,520.22 = 7,857.28 : x
2. Step 2: Convert to fraction form
   14,144.50/19,520.22 = 7,857.28/x
3. Step 3: Cross multiply
   14,144.50x = 19,520.22 × 7,857.28
4. Step 4: Simplify right side
   14,144.50x = 153,375,834.20
5. Step 5: Solve for x
   x = 153,375,834.20/14,144.50
6. Step 6: Final answer
   x = 10,843.50