Finding the Fourth Proportional to 31,121.38, 42,947.04 and 16,974.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,121.38 : 42,947.04 = 16,974.22 : x
2. Step 2: Convert to fraction form
   31,121.38/42,947.04 = 16,974.22/x
3. Step 3: Cross multiply
   31,121.38x = 42,947.04 × 16,974.22
4. Step 4: Simplify right side
   31,121.38x = 728,992,505.31
5. Step 5: Solve for x
   x = 728,992,505.31/31,121.38
6. Step 6: Final answer
   x = 23,424.17