Finding the Fourth Proportional to 67.08, 100.56 and 42.63

Step by Step Solution

1. Step 1: Write the proportion equation
   67.08 : 100.56 = 42.63 : x
2. Step 2: Convert to fraction form
   67.08/100.56 = 42.63/x
3. Step 3: Cross multiply
   67.08x = 100.56 × 42.63
4. Step 4: Simplify right side
   67.08x = 4,287.41
5. Step 5: Solve for x
   x = 4,287.41/67.08
6. Step 6: Final answer
   x = 63.91