Finding the Fourth Proportional to 31,087.74, 42,900.90 and 16,940.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.74 : 42,900.90 = 16,940.54 : x
2. Step 2: Convert to fraction form
   31,087.74/42,900.90 = 16,940.54/x
3. Step 3: Cross multiply
   31,087.74x = 42,900.90 × 16,940.54
4. Step 4: Simplify right side
   31,087.74x = 726,764,412.49
5. Step 5: Solve for x
   x = 726,764,412.49/31,087.74
6. Step 6: Final answer
   x = 23,377.85