Finding the Fourth Proportional to 71.22, 106.71 and 49.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71.22 : 106.71 = 49.50 : x
2. Step 2: Convert to fraction form
   71.22/106.71 = 49.50/x
3. Step 3: Cross multiply
   71.22x = 106.71 × 49.50
4. Step 4: Simplify right side
   71.22x = 5,282.15
5. Step 5: Solve for x
   x = 5,282.15/71.22
6. Step 6: Final answer
   x = 74.17