Finding the Fourth Proportional to 31,120.54, 42,950.21 and 19,018.54

Step by Step Solution

1. Step 1: Write the proportion equation
   31,120.54 : 42,950.21 = 19,018.54 : x
2. Step 2: Convert to fraction form
   31,120.54/42,950.21 = 19,018.54/x
3. Step 3: Cross multiply
   31,120.54x = 42,950.21 × 19,018.54
4. Step 4: Simplify right side
   31,120.54x = 816,850,286.89
5. Step 5: Solve for x
   x = 816,850,286.89/31,120.54
6. Step 6: Final answer
   x = 26,247.95