Finding the Fourth Proportional to 67.74, 101.37 and 57.18

Step by Step Solution

1. Step 1: Write the proportion equation
   67.74 : 101.37 = 57.18 : x
2. Step 2: Convert to fraction form
   67.74/101.37 = 57.18/x
3. Step 3: Cross multiply
   67.74x = 101.37 × 57.18
4. Step 4: Simplify right side
   67.74x = 5,796.34
5. Step 5: Solve for x
   x = 5,796.34/67.74
6. Step 6: Final answer
   x = 85.57