Finding the Fourth Proportional to 222.18, 333.39 and 100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   222.18 : 333.39 = 100.42 : x
2. Step 2: Convert to fraction form
   222.18/333.39 = 100.42/x
3. Step 3: Cross multiply
   222.18x = 333.39 × 100.42
4. Step 4: Simplify right side
   222.18x = 33,479.02
5. Step 5: Solve for x
   x = 33,479.02/222.18
6. Step 6: Final answer
   x = 150.68