Finding the Fourth Proportional to 31,067.54, 42,873.69 and 16,920.37

Step by Step Solution

1. Step 1: Write the proportion equation
   31,067.54 : 42,873.69 = 16,920.37 : x
2. Step 2: Convert to fraction form
   31,067.54/42,873.69 = 16,920.37/x
3. Step 3: Cross multiply
   31,067.54x = 42,873.69 × 16,920.37
4. Step 4: Simplify right side
   31,067.54x = 725,438,698.07
5. Step 5: Solve for x
   x = 725,438,698.07/31,067.54
6. Step 6: Final answer
   x = 23,350.37