Finding the Third Proportional to 111,326 and 217,079

Step by Step Solution

1. Step 1: Write the proportion equation
   111,326 : 217,079 = 217,079 : x
2. Step 2: Convert to fraction form
   111,326/217,079 = 217,079/x
3. Step 3: Cross multiply
   111,326x = 217,079 × 217,079
4. Step 4: Simplify right side
   111,326x = 47,123,292,241
5. Step 5: Solve for x
   x = 47,123,292,241/111,326
6. Step 6: Final answer
   x = 423,290.99