Finding the Fourth Proportional to 105.07, 144.82 and 72.26

Step by Step Solution

1. Step 1: Write the proportion equation
   105.07 : 144.82 = 72.26 : x
2. Step 2: Convert to fraction form
   105.07/144.82 = 72.26/x
3. Step 3: Cross multiply
   105.07x = 144.82 × 72.26
4. Step 4: Simplify right side
   105.07x = 10,464.69
5. Step 5: Solve for x
   x = 10,464.69/105.07
6. Step 6: Final answer
   x = 99.60