Finding the Third Proportional to 161,456 and 351,978

Step by Step Solution

1. Step 1: Write the proportion equation
   161,456 : 351,978 = 351,978 : x
2. Step 2: Convert to fraction form
   161,456/351,978 = 351,978/x
3. Step 3: Cross multiply
   161,456x = 351,978 × 351,978
4. Step 4: Simplify right side
   161,456x = 123,888,512,484
5. Step 5: Solve for x
   x = 123,888,512,484/161,456
6. Step 6: Final answer
   x = 767,320.59