Finding the Fourth Proportional to 78.69, 118.02 and 35.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78.69 : 118.02 = 35.34 : x
2. Step 2: Convert to fraction form
   78.69/118.02 = 35.34/x
3. Step 3: Cross multiply
   78.69x = 118.02 × 35.34
4. Step 4: Simplify right side
   78.69x = 4,170.83
5. Step 5: Solve for x
   x = 4,170.83/78.69
6. Step 6: Final answer
   x = 53.00