Finding the Fourth Proportional to 67.06, 100.54 and 28.56

Step by Step Solution

1. Step 1: Write the proportion equation
   67.06 : 100.54 = 28.56 : x
2. Step 2: Convert to fraction form
   67.06/100.54 = 28.56/x
3. Step 3: Cross multiply
   67.06x = 100.54 × 28.56
4. Step 4: Simplify right side
   67.06x = 2,871.35
5. Step 5: Solve for x
   x = 2,871.35/67.06
6. Step 6: Final answer
   x = 42.82