Finding the Fourth Proportional to 31,022.20, 42,809.34 and 16,874.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,022.20 : 42,809.34 = 16,874.20 : x
2. Step 2: Convert to fraction form
   31,022.20/42,809.34 = 16,874.20/x
3. Step 3: Cross multiply
   31,022.20x = 42,809.34 × 16,874.20
4. Step 4: Simplify right side
   31,022.20x = 722,373,365.03
5. Step 5: Solve for x
   x = 722,373,365.03/31,022.20
6. Step 6: Final answer
   x = 23,285.69