Finding the Fourth Proportional to 67.08, 100.61 and 28.56

Step by Step Solution

1. Step 1: Write the proportion equation
   67.08 : 100.61 = 28.56 : x
2. Step 2: Convert to fraction form
   67.08/100.61 = 28.56/x
3. Step 3: Cross multiply
   67.08x = 100.61 × 28.56
4. Step 4: Simplify right side
   67.08x = 2,873.42
5. Step 5: Solve for x
   x = 2,873.42/67.08
6. Step 6: Final answer
   x = 42.84