Finding the Fourth Proportional to 31,105, 42,924.99 and 16,957.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105 : 42,924.99 = 16,957.54 : x
2. Step 2: Convert to fraction form
   31,105/42,924.99 = 16,957.54/x
3. Step 3: Cross multiply
   31,105x = 42,924.99 × 16,957.54
4. Step 4: Simplify right side
   31,105x = 727,902,234.92
5. Step 5: Solve for x
   x = 727,902,234.92/31,105
6. Step 6: Final answer
   x = 23,401.45