Finding the Fourth Proportional to 82.18, 123.27 and 64.09

Step by Step Solution

1. Step 1: Write the proportion equation
   82.18 : 123.27 = 64.09 : x
2. Step 2: Convert to fraction form
   82.18/123.27 = 64.09/x
3. Step 3: Cross multiply
   82.18x = 123.27 × 64.09
4. Step 4: Simplify right side
   82.18x = 7,900.37
5. Step 5: Solve for x
   x = 7,900.37/82.18
6. Step 6: Final answer
   x = 96.14