Finding the Fourth Proportional to 31,087.66, 42,900.98 and 16,940.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.66 : 42,900.98 = 16,940.50 : x
2. Step 2: Convert to fraction form
   31,087.66/42,900.98 = 16,940.50/x
3. Step 3: Cross multiply
   31,087.66x = 42,900.98 × 16,940.50
4. Step 4: Simplify right side
   31,087.66x = 726,764,051.69
5. Step 5: Solve for x
   x = 726,764,051.69/31,087.66
6. Step 6: Final answer
   x = 23,377.90