Finding the Third Proportional to 155,710 and 340,499

Step by Step Solution

1. Step 1: Write the proportion equation
   155,710 : 340,499 = 340,499 : x
2. Step 2: Convert to fraction form
   155,710/340,499 = 340,499/x
3. Step 3: Cross multiply
   155,710x = 340,499 × 340,499
4. Step 4: Simplify right side
   155,710x = 115,939,569,001
5. Step 5: Solve for x
   x = 115,939,569,001/155,710
6. Step 6: Final answer
   x = 744,586.53