Finding the Fourth Proportional to 67.17, 100.76 and 18.42

Step by Step Solution

1. Step 1: Write the proportion equation
   67.17 : 100.76 = 18.42 : x
2. Step 2: Convert to fraction form
   67.17/100.76 = 18.42/x
3. Step 3: Cross multiply
   67.17x = 100.76 × 18.42
4. Step 4: Simplify right side
   67.17x = 1,856.00
5. Step 5: Solve for x
   x = 1,856.00/67.17
6. Step 6: Final answer
   x = 27.63