Finding the Fourth Proportional to 31,118.05, 42,936.46 and 18,194.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.05 : 42,936.46 = 18,194.83 : x
2. Step 2: Convert to fraction form
   31,118.05/42,936.46 = 18,194.83/x
3. Step 3: Cross multiply
   31,118.05x = 42,936.46 × 18,194.83
4. Step 4: Simplify right side
   31,118.05x = 781,221,781.54
5. Step 5: Solve for x
   x = 781,221,781.54/31,118.05
6. Step 6: Final answer
   x = 25,105.10