Finding the Fourth Proportional to 105,198.96, 145,078.40 and 82,231.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,198.96 : 145,078.40 = 82,231.82 : x
2. Step 2: Convert to fraction form
   105,198.96/145,078.40 = 82,231.82/x
3. Step 3: Cross multiply
   105,198.96x = 145,078.40 × 82,231.82
4. Step 4: Simplify right side
   105,198.96x = 11,930,060,874.69
5. Step 5: Solve for x
   x = 11,930,060,874.69/105,198.96
6. Step 6: Final answer
   x = 113,404.74