Finding the Fourth Proportional to 31,120.29, 42,949.87 and 19,018.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.29 : 42,949.87 = 19,018.29 : x
2. Step 2: Convert to fraction form
   31,120.29/42,949.87 = 19,018.29/x
3. Step 3: Cross multiply
   31,120.29x = 42,949.87 × 19,018.29
4. Step 4: Simplify right side
   31,120.29x = 816,833,083.12
5. Step 5: Solve for x
   x = 816,833,083.12/31,120.29
6. Step 6: Final answer
   x = 26,247.61