Finding the Fourth Proportional to 105.98, 146.22 and 67.19

Step by Step Solution

1. Step 1: Write the proportion equation
   105.98 : 146.22 = 67.19 : x
2. Step 2: Convert to fraction form
   105.98/146.22 = 67.19/x
3. Step 3: Cross multiply
   105.98x = 146.22 × 67.19
4. Step 4: Simplify right side
   105.98x = 9,824.52
5. Step 5: Solve for x
   x = 9,824.52/105.98
6. Step 6: Final answer
   x = 92.70