Finding the Fourth Proportional to 82.78, 124.18 and 46.22

Step by Step Solution

1. Step 1: Write the proportion equation
   82.78 : 124.18 = 46.22 : x
2. Step 2: Convert to fraction form
   82.78/124.18 = 46.22/x
3. Step 3: Cross multiply
   82.78x = 124.18 × 46.22
4. Step 4: Simplify right side
   82.78x = 5,738.86
5. Step 5: Solve for x
   x = 5,738.86/82.78
6. Step 6: Final answer
   x = 69.33