Finding the Fourth Proportional to 31,127.73, 42,942.36 and 19,186.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,127.73 : 42,942.36 = 19,186.71 : x
2. Step 2: Convert to fraction form
   31,127.73/42,942.36 = 19,186.71/x
3. Step 3: Cross multiply
   31,127.73x = 42,942.36 × 19,186.71
4. Step 4: Simplify right side
   31,127.73x = 823,922,608.04
5. Step 5: Solve for x
   x = 823,922,608.04/31,127.73
6. Step 6: Final answer
   x = 26,469.09