Finding the Third Proportional to 222,756 and 345,231

Step by Step Solution

1. Step 1: Write the proportion equation
   222,756 : 345,231 = 345,231 : x
2. Step 2: Convert to fraction form
   222,756/345,231 = 345,231/x
3. Step 3: Cross multiply
   222,756x = 345,231 × 345,231
4. Step 4: Simplify right side
   222,756x = 119,184,443,361
5. Step 5: Solve for x
   x = 119,184,443,361/222,756
6. Step 6: Final answer
   x = 535,044.82