Finding the Third Proportional to 100,956 and 222,216

Step by Step Solution

1. Step 1: Write the proportion equation
   100,956 : 222,216 = 222,216 : x
2. Step 2: Convert to fraction form
   100,956/222,216 = 222,216/x
3. Step 3: Cross multiply
   100,956x = 222,216 × 222,216
4. Step 4: Simplify right side
   100,956x = 49,379,950,656
5. Step 5: Solve for x
   x = 49,379,950,656/100,956
6. Step 6: Final answer
   x = 489,123.49