Finding the Fourth Proportional to 31,118.29, 42,947.10 and 19,016.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.29 : 42,947.10 = 19,016.28 : x
2. Step 2: Convert to fraction form
   31,118.29/42,947.10 = 19,016.28/x
3. Step 3: Cross multiply
   31,118.29x = 42,947.10 × 19,016.28
4. Step 4: Simplify right side
   31,118.29x = 816,694,078.79
5. Step 5: Solve for x
   x = 816,694,078.79/31,118.29
6. Step 6: Final answer
   x = 26,244.83