Finding the Fourth Proportional to 31,087.98, 42,901.28 and 16,940.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.98 : 42,901.28 = 16,940.83 : x
2. Step 2: Convert to fraction form
   31,087.98/42,901.28 = 16,940.83/x
3. Step 3: Cross multiply
   31,087.98x = 42,901.28 × 16,940.83
4. Step 4: Simplify right side
   31,087.98x = 726,783,099.31
5. Step 5: Solve for x
   x = 726,783,099.31/31,087.98
6. Step 6: Final answer
   x = 23,378.27