Finding the Fourth Proportional to 67.18, 100.69 and 40.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67.18 : 100.69 = 40.05 : x
2. Step 2: Convert to fraction form
   67.18/100.69 = 40.05/x
3. Step 3: Cross multiply
   67.18x = 100.69 × 40.05
4. Step 4: Simplify right side
   67.18x = 4,032.63
5. Step 5: Solve for x
   x = 4,032.63/67.18
6. Step 6: Final answer
   x = 60.03