Finding the Fourth Proportional to 31,126.38, 42,954.81 and 16,979.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,126.38 : 42,954.81 = 16,979.22 : x
2. Step 2: Convert to fraction form
   31,126.38/42,954.81 = 16,979.22/x
3. Step 3: Cross multiply
   31,126.38x = 42,954.81 × 16,979.22
4. Step 4: Simplify right side
   31,126.38x = 729,339,105.38
5. Step 5: Solve for x
   x = 729,339,105.38/31,126.38
6. Step 6: Final answer
   x = 23,431.55