Finding the Fourth Proportional to 12,728.88, 17,565.96 and 7,064.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728.88 : 17,565.96 = 7,064.01 : x
2. Step 2: Convert to fraction form
   12,728.88/17,565.96 = 7,064.01/x
3. Step 3: Cross multiply
   12,728.88x = 17,565.96 × 7,064.01
4. Step 4: Simplify right side
   12,728.88x = 124,086,143.59
5. Step 5: Solve for x
   x = 124,086,143.59/12,728.88
6. Step 6: Final answer
   x = 9,748.39