Finding the Fourth Proportional to 105,591.97, 145,600.12 and 67,290.81

Step by Step Solution

1. Step 1: Write the proportion equation
   105,591.97 : 145,600.12 = 67,290.81 : x
2. Step 2: Convert to fraction form
   105,591.97/145,600.12 = 67,290.81/x
3. Step 3: Cross multiply
   105,591.97x = 145,600.12 × 67,290.81
4. Step 4: Simplify right side
   105,591.97x = 9,797,550,010.90
5. Step 5: Solve for x
   x = 9,797,550,010.90/105,591.97
6. Step 6: Final answer
   x = 92,786.89