Finding the Fourth Proportional to 82.44, 123.42 and 64.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82.44 : 123.42 = 64.12 : x
2. Step 2: Convert to fraction form
   82.44/123.42 = 64.12/x
3. Step 3: Cross multiply
   82.44x = 123.42 × 64.12
4. Step 4: Simplify right side
   82.44x = 7,913.69
5. Step 5: Solve for x
   x = 7,913.69/82.44
6. Step 6: Final answer
   x = 95.99