Finding the Fourth Proportional to 105.98, 146.27 and 64.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105.98 : 146.27 = 64.53 : x
2. Step 2: Convert to fraction form
   105.98/146.27 = 64.53/x
3. Step 3: Cross multiply
   105.98x = 146.27 × 64.53
4. Step 4: Simplify right side
   105.98x = 9,438.80
5. Step 5: Solve for x
   x = 9,438.80/105.98
6. Step 6: Final answer
   x = 89.06