Finding the Fourth Proportional to 72.22, 108.34 and 71.96

Step by Step Solution

1. Step 1: Write the proportion equation
   72.22 : 108.34 = 71.96 : x
2. Step 2: Convert to fraction form
   72.22/108.34 = 71.96/x
3. Step 3: Cross multiply
   72.22x = 108.34 × 71.96
4. Step 4: Simplify right side
   72.22x = 7,796.15
5. Step 5: Solve for x
   x = 7,796.15/72.22
6. Step 6: Final answer
   x = 107.95