Finding the Fourth Proportional to 12,965.27, 19,426.03 and 8,569.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.27 : 19,426.03 = 8,569.40 : x
2. Step 2: Convert to fraction form
   12,965.27/19,426.03 = 8,569.40/x
3. Step 3: Cross multiply
   12,965.27x = 19,426.03 × 8,569.40
4. Step 4: Simplify right side
   12,965.27x = 166,469,302.93
5. Step 5: Solve for x
   x = 166,469,302.93/12,965.27
6. Step 6: Final answer
   x = 12,839.64