Finding the Fourth Proportional to 82.23, 123.56 and 74.18

Step by Step Solution

1. Step 1: Write the proportion equation
   82.23 : 123.56 = 74.18 : x
2. Step 2: Convert to fraction form
   82.23/123.56 = 74.18/x
3. Step 3: Cross multiply
   82.23x = 123.56 × 74.18
4. Step 4: Simplify right side
   82.23x = 9,164.69
5. Step 5: Solve for x
   x = 9,164.69/82.23
6. Step 6: Final answer
   x = 111.45