Finding the Fourth Proportional to 31,087.27, 42,889.89 and 18,983.33

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.27 : 42,889.89 = 18,983.33 : x
2. Step 2: Convert to fraction form
   31,087.27/42,889.89 = 18,983.33/x
3. Step 3: Cross multiply
   31,087.27x = 42,889.89 × 18,983.33
4. Step 4: Simplify right side
   31,087.27x = 814,192,956.82
5. Step 5: Solve for x
   x = 814,192,956.82/31,087.27
6. Step 6: Final answer
   x = 26,190.56