Finding the Fourth Proportional to 22,936.91, 31,651.29 and 12,728.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,936.91 : 31,651.29 = 12,728.48 : x
2. Step 2: Convert to fraction form
   22,936.91/31,651.29 = 12,728.48/x
3. Step 3: Cross multiply
   22,936.91x = 31,651.29 × 12,728.48
4. Step 4: Simplify right side
   22,936.91x = 402,872,653.48
5. Step 5: Solve for x
   x = 402,872,653.48/22,936.91
6. Step 6: Final answer
   x = 17,564.39