Finding the Third Proportional to 155,717 and 340,510

Step by Step Solution

1. Step 1: Write the proportion equation
   155,717 : 340,510 = 340,510 : x
2. Step 2: Convert to fraction form
   155,717/340,510 = 340,510/x
3. Step 3: Cross multiply
   155,717x = 340,510 × 340,510
4. Step 4: Simplify right side
   155,717x = 115,947,060,100
5. Step 5: Solve for x
   x = 115,947,060,100/155,717
6. Step 6: Final answer
   x = 744,601.17