Finding the Fourth Proportional to 12,859.31, 17,745.23 and 8,081.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,859.31 : 17,745.23 = 8,081.73 : x
2. Step 2: Convert to fraction form
   12,859.31/17,745.23 = 8,081.73/x
3. Step 3: Cross multiply
   12,859.31x = 17,745.23 × 8,081.73
4. Step 4: Simplify right side
   12,859.31x = 143,412,028.51
5. Step 5: Solve for x
   x = 143,412,028.51/12,859.31
6. Step 6: Final answer
   x = 11,152.39