Finding the Fourth Proportional to 67.37, 100.91 and 57.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67.37 : 100.91 = 57.05 : x
2. Step 2: Convert to fraction form
   67.37/100.91 = 57.05/x
3. Step 3: Cross multiply
   67.37x = 100.91 × 57.05
4. Step 4: Simplify right side
   67.37x = 5,756.13
5. Step 5: Solve for x
   x = 5,756.13/67.37
6. Step 6: Final answer
   x = 85.44