Finding the Fourth Proportional to 78.69, 118.04 and 46.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78.69 : 118.04 = 46.18 : x
2. Step 2: Convert to fraction form
   78.69/118.04 = 46.18/x
3. Step 3: Cross multiply
   78.69x = 118.04 × 46.18
4. Step 4: Simplify right side
   78.69x = 5,451.09
5. Step 5: Solve for x
   x = 5,451.09/78.69
6. Step 6: Final answer
   x = 69.27