Finding the Fourth Proportional to 105.47, 144.18 and 105.47

Step by Step Solution

1. Step 1: Write the proportion equation
   105.47 : 144.18 = 105.47 : x
2. Step 2: Convert to fraction form
   105.47/144.18 = 105.47/x
3. Step 3: Cross multiply
   105.47x = 144.18 × 105.47
4. Step 4: Simplify right side
   105.47x = 15,205.94
5. Step 5: Solve for x
   x = 15,205.94/105.47
6. Step 6: Final answer
   x = 144.18