Finding the Fourth Proportional to 31,016.05, 42,800.85 and 18,269.75

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.05 : 42,800.85 = 18,269.75 : x
2. Step 2: Convert to fraction form
   31,016.05/42,800.85 = 18,269.75/x
3. Step 3: Cross multiply
   31,016.05x = 42,800.85 × 18,269.75
4. Step 4: Simplify right side
   31,016.05x = 781,960,936.29
5. Step 5: Solve for x
   x = 781,960,936.29/31,016.05
6. Step 6: Final answer
   x = 25,211.50