Finding the Fourth Proportional to 22,375.81, 30,876.23 and 12,942.61

Step by Step Solution

1. Step 1: Write the proportion equation
   22,375.81 : 30,876.23 = 12,942.61 : x
2. Step 2: Convert to fraction form
   22,375.81/30,876.23 = 12,942.61/x
3. Step 3: Cross multiply
   22,375.81x = 30,876.23 × 12,942.61
4. Step 4: Simplify right side
   22,375.81x = 399,618,938.45
5. Step 5: Solve for x
   x = 399,618,938.45/22,375.81
6. Step 6: Final answer
   x = 17,859.42