Finding the Third Proportional to 155,978 and 343,732

Step by Step Solution

1. Step 1: Write the proportion equation
   155,978 : 343,732 = 343,732 : x
2. Step 2: Convert to fraction form
   155,978/343,732 = 343,732/x
3. Step 3: Cross multiply
   155,978x = 343,732 × 343,732
4. Step 4: Simplify right side
   155,978x = 118,151,687,824
5. Step 5: Solve for x
   x = 118,151,687,824/155,978
6. Step 6: Final answer
   x = 757,489.44