Finding the Fourth Proportional to 22,414.56, 30,942.72 and 12,979.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,414.56 : 30,942.72 = 12,979.68 : x
2. Step 2: Convert to fraction form
   22,414.56/30,942.72 = 12,979.68/x
3. Step 3: Cross multiply
   22,414.56x = 30,942.72 × 12,979.68
4. Step 4: Simplify right side
   22,414.56x = 401,626,603.93
5. Step 5: Solve for x
   x = 401,626,603.93/22,414.56
6. Step 6: Final answer
   x = 17,918.11