Finding the Fourth Proportional to 82.67, 124.03 and 42.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82.67 : 124.03 = 42.12 : x
2. Step 2: Convert to fraction form
   82.67/124.03 = 42.12/x
3. Step 3: Cross multiply
   82.67x = 124.03 × 42.12
4. Step 4: Simplify right side
   82.67x = 5,224.20
5. Step 5: Solve for x
   x = 5,224.20/82.67
6. Step 6: Final answer
   x = 63.19