Finding the Fourth Proportional to 31,089.92, 42,903.90 and 16,942.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.92 : 42,903.90 = 16,942.76 : x
2. Step 2: Convert to fraction form
   31,089.92/42,903.90 = 16,942.76/x
3. Step 3: Cross multiply
   31,089.92x = 42,903.90 × 16,942.76
4. Step 4: Simplify right side
   31,089.92x = 726,910,480.76
5. Step 5: Solve for x
   x = 726,910,480.76/31,089.92
6. Step 6: Final answer
   x = 23,380.91