Finding the Fourth Proportional to 90.82, 136.25 and 76.34

Step by Step Solution

1. Step 1: Write the proportion equation
   90.82 : 136.25 = 76.34 : x
2. Step 2: Convert to fraction form
   90.82/136.25 = 76.34/x
3. Step 3: Cross multiply
   90.82x = 136.25 × 76.34
4. Step 4: Simplify right side
   90.82x = 10,401.57
5. Step 5: Solve for x
   x = 10,401.57/90.82
6. Step 6: Final answer
   x = 114.53