Finding the Fourth Proportional to 82.48, 123.72 and 30.42

Step by Step Solution

1. Step 1: Write the proportion equation
   82.48 : 123.72 = 30.42 : x
2. Step 2: Convert to fraction form
   82.48/123.72 = 30.42/x
3. Step 3: Cross multiply
   82.48x = 123.72 × 30.42
4. Step 4: Simplify right side
   82.48x = 3,763.56
5. Step 5: Solve for x
   x = 3,763.56/82.48
6. Step 6: Final answer
   x = 45.63