Finding the Fourth Proportional to 67.82, 101.57 and 57.69

Step by Step Solution

1. Step 1: Write the proportion equation
   67.82 : 101.57 = 57.69 : x
2. Step 2: Convert to fraction form
   67.82/101.57 = 57.69/x
3. Step 3: Cross multiply
   67.82x = 101.57 × 57.69
4. Step 4: Simplify right side
   67.82x = 5,859.28
5. Step 5: Solve for x
   x = 5,859.28/67.82
6. Step 6: Final answer
   x = 86.40