Finding the Fourth Proportional to 86.04, 118.72 and 49.18

Step by Step Solution

1. Step 1: Write the proportion equation
   86.04 : 118.72 = 49.18 : x
2. Step 2: Convert to fraction form
   86.04/118.72 = 49.18/x
3. Step 3: Cross multiply
   86.04x = 118.72 × 49.18
4. Step 4: Simplify right side
   86.04x = 5,838.69
5. Step 5: Solve for x
   x = 5,838.69/86.04
6. Step 6: Final answer
   x = 67.86