Finding the Fourth Proportional to 67.98, 101.74 and 57.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.98 : 101.74 = 57.72 : x
2. Step 2: Convert to fraction form
   67.98/101.74 = 57.72/x
3. Step 3: Cross multiply
   67.98x = 101.74 × 57.72
4. Step 4: Simplify right side
   67.98x = 5,872.43
5. Step 5: Solve for x
   x = 5,872.43/67.98
6. Step 6: Final answer
   x = 86.38