Finding the Fourth Proportional to 67.04, 100.56 and 56.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67.04 : 100.56 = 56.42 : x
2. Step 2: Convert to fraction form
   67.04/100.56 = 56.42/x
3. Step 3: Cross multiply
   67.04x = 100.56 × 56.42
4. Step 4: Simplify right side
   67.04x = 5,673.60
5. Step 5: Solve for x
   x = 5,673.60/67.04
6. Step 6: Final answer
   x = 84.63