Finding the Fourth Proportional to 67.91, 101.99 and 57.22

Step by Step Solution

1. Step 1: Write the proportion equation
   67.91 : 101.99 = 57.22 : x
2. Step 2: Convert to fraction form
   67.91/101.99 = 57.22/x
3. Step 3: Cross multiply
   67.91x = 101.99 × 57.22
4. Step 4: Simplify right side
   67.91x = 5,835.78
5. Step 5: Solve for x
   x = 5,835.78/67.91
6. Step 6: Final answer
   x = 85.93