Finding the Fourth Proportional to 31,087.75, 42,901.10 and 16,940.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.75 : 42,901.10 = 16,940.59 : x
2. Step 2: Convert to fraction form
   31,087.75/42,901.10 = 16,940.59/x
3. Step 3: Cross multiply
   31,087.75x = 42,901.10 × 16,940.59
4. Step 4: Simplify right side
   31,087.75x = 726,769,945.65
5. Step 5: Solve for x
   x = 726,769,945.65/31,087.75
6. Step 6: Final answer
   x = 23,378.02