Finding the Fourth Proportional to 31,016.28, 42,788.74 and 19,072.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.28 : 42,788.74 = 19,072.56 : x
2. Step 2: Convert to fraction form
   31,016.28/42,788.74 = 19,072.56/x
3. Step 3: Cross multiply
   31,016.28x = 42,788.74 × 19,072.56
4. Step 4: Simplify right side
   31,016.28x = 816,090,932.92
5. Step 5: Solve for x
   x = 816,090,932.92/31,016.28
6. Step 6: Final answer
   x = 26,311.69