Finding the Fourth Proportional to 12,728.42, 17,564.77 and 7,063.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728.42 : 17,564.77 = 7,063.42 : x
2. Step 2: Convert to fraction form
   12,728.42/17,564.77 = 7,063.42/x
3. Step 3: Cross multiply
   12,728.42x = 17,564.77 × 7,063.42
4. Step 4: Simplify right side
   12,728.42x = 124,067,305.83
5. Step 5: Solve for x
   x = 124,067,305.83/12,728.42
6. Step 6: Final answer
   x = 9,747.26