Finding the Fourth Proportional to 16,965.17, 23,411.77 and 9,411.51

Step by Step Solution

1. Step 1: Write the proportion equation
   16,965.17 : 23,411.77 = 9,411.51 : x
2. Step 2: Convert to fraction form
   16,965.17/23,411.77 = 9,411.51/x
3. Step 3: Cross multiply
   16,965.17x = 23,411.77 × 9,411.51
4. Step 4: Simplify right side
   16,965.17x = 220,340,083.94
5. Step 5: Solve for x
   x = 220,340,083.94/16,965.17
6. Step 6: Final answer
   x = 12,987.79