Finding the Third Proportional to 143,336 and 222,688

Step by Step Solution

1. Step 1: Write the proportion equation
   143,336 : 222,688 = 222,688 : x
2. Step 2: Convert to fraction form
   143,336/222,688 = 222,688/x
3. Step 3: Cross multiply
   143,336x = 222,688 × 222,688
4. Step 4: Simplify right side
   143,336x = 49,589,945,344
5. Step 5: Solve for x
   x = 49,589,945,344/143,336
6. Step 6: Final answer
   x = 345,969.93