Finding the Fourth Proportional to 78.82, 108.33 and 69.55

Step by Step Solution

1. Step 1: Write the proportion equation
   78.82 : 108.33 = 69.55 : x
2. Step 2: Convert to fraction form
   78.82/108.33 = 69.55/x
3. Step 3: Cross multiply
   78.82x = 108.33 × 69.55
4. Step 4: Simplify right side
   78.82x = 7,534.49
5. Step 5: Solve for x
   x = 7,534.49/78.82
6. Step 6: Final answer
   x = 95.59