Finding the Fourth Proportional to 90.82, 125.23 and 82.18

Step by Step Solution

1. Step 1: Write the proportion equation
   90.82 : 125.23 = 82.18 : x
2. Step 2: Convert to fraction form
   90.82/125.23 = 82.18/x
3. Step 3: Cross multiply
   90.82x = 125.23 × 82.18
4. Step 4: Simplify right side
   90.82x = 10,290.36
5. Step 5: Solve for x
   x = 10,290.36/90.82
6. Step 6: Final answer
   x = 113.31