Finding the Fourth Proportional to 67.31, 100.94 and 43.23

Step by Step Solution

1. Step 1: Write the proportion equation
   67.31 : 100.94 = 43.23 : x
2. Step 2: Convert to fraction form
   67.31/100.94 = 43.23/x
3. Step 3: Cross multiply
   67.31x = 100.94 × 43.23
4. Step 4: Simplify right side
   67.31x = 4,363.42
5. Step 5: Solve for x
   x = 4,363.42/67.31
6. Step 6: Final answer
   x = 64.83