Finding the Third Proportional to 155,209 and 338,849

Step by Step Solution

1. Step 1: Write the proportion equation
   155,209 : 338,849 = 338,849 : x
2. Step 2: Convert to fraction form
   155,209/338,849 = 338,849/x
3. Step 3: Cross multiply
   155,209x = 338,849 × 338,849
4. Step 4: Simplify right side
   155,209x = 114,818,644,801
5. Step 5: Solve for x
   x = 114,818,644,801/155,209
6. Step 6: Final answer
   x = 739,767.96