Finding the Fourth Proportional to 105.01, 144.87 and 72.22

Step by Step Solution

1. Step 1: Write the proportion equation
   105.01 : 144.87 = 72.22 : x
2. Step 2: Convert to fraction form
   105.01/144.87 = 72.22/x
3. Step 3: Cross multiply
   105.01x = 144.87 × 72.22
4. Step 4: Simplify right side
   105.01x = 10,462.51
5. Step 5: Solve for x
   x = 10,462.51/105.01
6. Step 6: Final answer
   x = 99.63