Finding the Fourth Proportional to 31,114.28, 42,938.55 and 19,016.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,114.28 : 42,938.55 = 19,016.72 : x
2. Step 2: Convert to fraction form
   31,114.28/42,938.55 = 19,016.72/x
3. Step 3: Cross multiply
   31,114.28x = 42,938.55 × 19,016.72
4. Step 4: Simplify right side
   31,114.28x = 816,550,382.56
5. Step 5: Solve for x
   x = 816,550,382.56/31,114.28
6. Step 6: Final answer
   x = 26,243.59