Finding the Fourth Proportional to 31,089.20, 42,903.14 and 16,942.14

Step by Step Solution

1. Step 1: Write the proportion equation
   31,089.20 : 42,903.14 = 16,942.14 : x
2. Step 2: Convert to fraction form
   31,089.20/42,903.14 = 16,942.14/x
3. Step 3: Cross multiply
   31,089.20x = 42,903.14 × 16,942.14
4. Step 4: Simplify right side
   31,089.20x = 726,870,919.61
5. Step 5: Solve for x
   x = 726,870,919.61/31,089.20
6. Step 6: Final answer
   x = 23,380.18