Finding the Fourth Proportional to 67.41, 100.77 and 57.36

Step by Step Solution

1. Step 1: Write the proportion equation
   67.41 : 100.77 = 57.36 : x
2. Step 2: Convert to fraction form
   67.41/100.77 = 57.36/x
3. Step 3: Cross multiply
   67.41x = 100.77 × 57.36
4. Step 4: Simplify right side
   67.41x = 5,780.17
5. Step 5: Solve for x
   x = 5,780.17/67.41
6. Step 6: Final answer
   x = 85.75