Finding the Fourth Proportional to 78.82, 118.14 and 38.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78.82 : 118.14 = 38.18 : x
2. Step 2: Convert to fraction form
   78.82/118.14 = 38.18/x
3. Step 3: Cross multiply
   78.82x = 118.14 × 38.18
4. Step 4: Simplify right side
   78.82x = 4,510.59
5. Step 5: Solve for x
   x = 4,510.59/78.82
6. Step 6: Final answer
   x = 57.23