Finding the Fourth Proportional to 70.82, 105.50 and 67.56

Step by Step Solution

1. Step 1: Write the proportion equation
   70.82 : 105.50 = 67.56 : x
2. Step 2: Convert to fraction form
   70.82/105.50 = 67.56/x
3. Step 3: Cross multiply
   70.82x = 105.50 × 67.56
4. Step 4: Simplify right side
   70.82x = 7,127.58
5. Step 5: Solve for x
   x = 7,127.58/70.82
6. Step 6: Final answer
   x = 100.64