Finding the Fourth Proportional to 85.82, 128.76 and 67.94

Step by Step Solution

1. Step 1: Write the proportion equation
   85.82 : 128.76 = 67.94 : x
2. Step 2: Convert to fraction form
   85.82/128.76 = 67.94/x
3. Step 3: Cross multiply
   85.82x = 128.76 × 67.94
4. Step 4: Simplify right side
   85.82x = 8,747.95
5. Step 5: Solve for x
   x = 8,747.95/85.82
6. Step 6: Final answer
   x = 101.93