Finding the Fourth Proportional to 105.03, 144.72 and 73.80

Step by Step Solution

1. Step 1: Write the proportion equation
   105.03 : 144.72 = 73.80 : x
2. Step 2: Convert to fraction form
   105.03/144.72 = 73.80/x
3. Step 3: Cross multiply
   105.03x = 144.72 × 73.80
4. Step 4: Simplify right side
   105.03x = 10,680.34
5. Step 5: Solve for x
   x = 10,680.34/105.03
6. Step 6: Final answer
   x = 101.69