Finding the Fourth Proportional to 103.41, 142.61 and 72.27

Step by Step Solution

1. Step 1: Write the proportion equation
   103.41 : 142.61 = 72.27 : x
2. Step 2: Convert to fraction form
   103.41/142.61 = 72.27/x
3. Step 3: Cross multiply
   103.41x = 142.61 × 72.27
4. Step 4: Simplify right side
   103.41x = 10,306.06
5. Step 5: Solve for x
   x = 10,306.06/103.41
6. Step 6: Final answer
   x = 99.66