Finding the Fourth Proportional to 104.25, 156.18 and 82.56

Step by Step Solution

1. Step 1: Write the proportion equation
   104.25 : 156.18 = 82.56 : x
2. Step 2: Convert to fraction form
   104.25/156.18 = 82.56/x
3. Step 3: Cross multiply
   104.25x = 156.18 × 82.56
4. Step 4: Simplify right side
   104.25x = 12,894.22
5. Step 5: Solve for x
   x = 12,894.22/104.25
6. Step 6: Final answer
   x = 123.69