Finding the Fourth Proportional to 78.69, 118.05 and 27.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78.69 : 118.05 = 27.32 : x
2. Step 2: Convert to fraction form
   78.69/118.05 = 27.32/x
3. Step 3: Cross multiply
   78.69x = 118.05 × 27.32
4. Step 4: Simplify right side
   78.69x = 3,225.54
5. Step 5: Solve for x
   x = 3,225.54/78.69
6. Step 6: Final answer
   x = 40.99