Finding the Fourth Proportional to 105.09, 144.98 and 60.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105.09 : 144.98 = 60.82 : x
2. Step 2: Convert to fraction form
   105.09/144.98 = 60.82/x
3. Step 3: Cross multiply
   105.09x = 144.98 × 60.82
4. Step 4: Simplify right side
   105.09x = 8,817.43
5. Step 5: Solve for x
   x = 8,817.43/105.09
6. Step 6: Final answer
   x = 83.91