Finding the Fourth Proportional to 71.17, 106.81 and 67.41

Step by Step Solution

1. Step 1: Write the proportion equation
   71.17 : 106.81 = 67.41 : x
2. Step 2: Convert to fraction form
   71.17/106.81 = 67.41/x
3. Step 3: Cross multiply
   71.17x = 106.81 × 67.41
4. Step 4: Simplify right side
   71.17x = 7,199.89
5. Step 5: Solve for x
   x = 7,199.89/71.17
6. Step 6: Final answer
   x = 101.17