Finding the Fourth Proportional to 22,768.38, 31,419.54 and 12,697.29

Step by Step Solution

1. Step 1: Write the proportion equation
   22,768.38 : 31,419.54 = 12,697.29 : x
2. Step 2: Convert to fraction form
   22,768.38/31,419.54 = 12,697.29/x
3. Step 3: Cross multiply
   22,768.38x = 31,419.54 × 12,697.29
4. Step 4: Simplify right side
   22,768.38x = 398,943,011.05
5. Step 5: Solve for x
   x = 398,943,011.05/22,768.38
6. Step 6: Final answer
   x = 17,521.80