Finding the Third Proportional to 216,778 and 333,622

Step by Step Solution

1. Step 1: Write the proportion equation
   216,778 : 333,622 = 333,622 : x
2. Step 2: Convert to fraction form
   216,778/333,622 = 333,622/x
3. Step 3: Cross multiply
   216,778x = 333,622 × 333,622
4. Step 4: Simplify right side
   216,778x = 111,303,638,884
5. Step 5: Solve for x
   x = 111,303,638,884/216,778
6. Step 6: Final answer
   x = 513,445.27