Finding the Fourth Proportional to 22,786.42, 31,436.85 and 13,351.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,786.42 : 31,436.85 = 13,351.54 : x
2. Step 2: Convert to fraction form
   22,786.42/31,436.85 = 13,351.54/x
3. Step 3: Cross multiply
   22,786.42x = 31,436.85 × 13,351.54
4. Step 4: Simplify right side
   22,786.42x = 419,730,360.25
5. Step 5: Solve for x
   x = 419,730,360.25/22,786.42
6. Step 6: Final answer
   x = 18,420.20