Finding the Fourth Proportional to 22,362.38, 30,859.43 and 12,290.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,362.38 : 30,859.43 = 12,290.81 : x
2. Step 2: Convert to fraction form
   22,362.38/30,859.43 = 12,290.81/x
3. Step 3: Cross multiply
   22,362.38x = 30,859.43 × 12,290.81
4. Step 4: Simplify right side
   22,362.38x = 379,287,406.53
5. Step 5: Solve for x
   x = 379,287,406.53/22,362.38
6. Step 6: Final answer
   x = 16,960.96