Finding the Fourth Proportional to 67.82, 101.21 and 57.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67.82 : 101.21 = 57.69 : x
2. Step 2: Convert to fraction form
   67.82/101.21 = 57.69/x
3. Step 3: Cross multiply
   67.82x = 101.21 × 57.69
4. Step 4: Simplify right side
   67.82x = 5,838.52
5. Step 5: Solve for x
   x = 5,838.52/67.82
6. Step 6: Final answer
   x = 86.09