Finding the Fourth Proportional to 67.43, 100.76 and 55.09

Step by Step Solution

1. Step 1: Write the proportion equation
   67.43 : 100.76 = 55.09 : x
2. Step 2: Convert to fraction form
   67.43/100.76 = 55.09/x
3. Step 3: Cross multiply
   67.43x = 100.76 × 55.09
4. Step 4: Simplify right side
   67.43x = 5,550.72
5. Step 5: Solve for x
   x = 5,550.72/67.43
6. Step 6: Final answer
   x = 82.32