Finding the Fourth Proportional to 31,786.78, 43,862.85 and 18,863.83

Step by Step Solution

1. Step 1: Write the proportion equation
   31,786.78 : 43,862.85 = 18,863.83 : x
2. Step 2: Convert to fraction form
   31,786.78/43,862.85 = 18,863.83/x
3. Step 3: Cross multiply
   31,786.78x = 43,862.85 × 18,863.83
4. Step 4: Simplify right side
   31,786.78x = 827,421,345.72
5. Step 5: Solve for x
   x = 827,421,345.72/31,786.78
6. Step 6: Final answer
   x = 26,030.36