Finding the Third Proportional to 222.06 and 425.69

Step by Step Solution

1. Step 1: Write the proportion equation
   222.06 : 425.69 = 425.69 : x
2. Step 2: Convert to fraction form
   222.06/425.69 = 425.69/x
3. Step 3: Cross multiply
   222.06x = 425.69 × 425.69
4. Step 4: Simplify right side
   222.06x = 181,209.85
5. Step 5: Solve for x
   x = 181,209.85/222.06
6. Step 6: Final answer
   x = 816.03