Finding the Fourth Proportional to 22,361.42, 30,859.50 and 12,290.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,361.42 : 30,859.50 = 12,290.22 : x
2. Step 2: Convert to fraction form
   22,361.42/30,859.50 = 12,290.22/x
3. Step 3: Cross multiply
   22,361.42x = 30,859.50 × 12,290.22
4. Step 4: Simplify right side
   22,361.42x = 379,270,044.09
5. Step 5: Solve for x
   x = 379,270,044.09/22,361.42
6. Step 6: Final answer
   x = 16,960.91