Finding the Fourth Proportional to 105.98, 146.18 and 67.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105.98 : 146.18 = 67.10 : x
2. Step 2: Convert to fraction form
   105.98/146.18 = 67.10/x
3. Step 3: Cross multiply
   105.98x = 146.18 × 67.10
4. Step 4: Simplify right side
   105.98x = 9,808.48
5. Step 5: Solve for x
   x = 9,808.48/105.98
6. Step 6: Final answer
   x = 92.55