Finding the Third Proportional to 155,839 and 336,280

Step by Step Solution

1. Step 1: Write the proportion equation
   155,839 : 336,280 = 336,280 : x
2. Step 2: Convert to fraction form
   155,839/336,280 = 336,280/x
3. Step 3: Cross multiply
   155,839x = 336,280 × 336,280
4. Step 4: Simplify right side
   155,839x = 113,084,238,400
5. Step 5: Solve for x
   x = 113,084,238,400/155,839
6. Step 6: Final answer
   x = 725,647.87