Finding the Fourth Proportional to 82.53, 123.16 and 74.88

Step by Step Solution

1. Step 1: Write the proportion equation
   82.53 : 123.16 = 74.88 : x
2. Step 2: Convert to fraction form
   82.53/123.16 = 74.88/x
3. Step 3: Cross multiply
   82.53x = 123.16 × 74.88
4. Step 4: Simplify right side
   82.53x = 9,222.03
5. Step 5: Solve for x
   x = 9,222.03/82.53
6. Step 6: Final answer
   x = 111.74