Finding the Fourth Proportional to 31,016.70, 42,800.94 and 16,869.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.70 : 42,800.94 = 16,869.24 : x
2. Step 2: Convert to fraction form
   31,016.70/42,800.94 = 16,869.24/x
3. Step 3: Cross multiply
   31,016.70x = 42,800.94 × 16,869.24
4. Step 4: Simplify right side
   31,016.70x = 722,019,329.09
5. Step 5: Solve for x
   x = 722,019,329.09/31,016.70
6. Step 6: Final answer
   x = 23,278.41