Finding the Fourth Proportional to 67.81, 93.59 and 40.18

Step by Step Solution

1. Step 1: Write the proportion equation
   67.81 : 93.59 = 40.18 : x
2. Step 2: Convert to fraction form
   67.81/93.59 = 40.18/x
3. Step 3: Cross multiply
   67.81x = 93.59 × 40.18
4. Step 4: Simplify right side
   67.81x = 3,759.78
5. Step 5: Solve for x
   x = 3,759.78/67.81
6. Step 6: Final answer
   x = 55.45