Finding the Fourth Proportional to 78.82, 108.84 and 67.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78.82 : 108.84 = 67.88 : x
2. Step 2: Convert to fraction form
   78.82/108.84 = 67.88/x
3. Step 3: Cross multiply
   78.82x = 108.84 × 67.88
4. Step 4: Simplify right side
   78.82x = 7,388.06
5. Step 5: Solve for x
   x = 7,388.06/78.82
6. Step 6: Final answer
   x = 93.73