Finding the Fourth Proportional to 67.43, 100.68 and 57.14

Step by Step Solution

1. Step 1: Write the proportion equation
   67.43 : 100.68 = 57.14 : x
2. Step 2: Convert to fraction form
   67.43/100.68 = 57.14/x
3. Step 3: Cross multiply
   67.43x = 100.68 × 57.14
4. Step 4: Simplify right side
   67.43x = 5,752.52
5. Step 5: Solve for x
   x = 5,752.52/67.43
6. Step 6: Final answer
   x = 85.31