Finding the Third Proportional to 112,923 and 222,990

Step by Step Solution

1. Step 1: Write the proportion equation
   112,923 : 222,990 = 222,990 : x
2. Step 2: Convert to fraction form
   112,923/222,990 = 222,990/x
3. Step 3: Cross multiply
   112,923x = 222,990 × 222,990
4. Step 4: Simplify right side
   112,923x = 49,724,540,100
5. Step 5: Solve for x
   x = 49,724,540,100/112,923
6. Step 6: Final answer
   x = 440,340.23