Finding the Fourth Proportional to 31,112.56, 42,936.15 and 19,183.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,112.56 : 42,936.15 = 19,183.78 : x
2. Step 2: Convert to fraction form
   31,112.56/42,936.15 = 19,183.78/x
3. Step 3: Cross multiply
   31,112.56x = 42,936.15 × 19,183.78
4. Step 4: Simplify right side
   31,112.56x = 823,677,655.65
5. Step 5: Solve for x
   x = 823,677,655.65/31,112.56
6. Step 6: Final answer
   x = 26,474.12