Finding the Third Proportional to 158,978 and 349,060

Step by Step Solution

1. Step 1: Write the proportion equation
   158,978 : 349,060 = 349,060 : x
2. Step 2: Convert to fraction form
   158,978/349,060 = 349,060/x
3. Step 3: Cross multiply
   158,978x = 349,060 × 349,060
4. Step 4: Simplify right side
   158,978x = 121,842,883,600
5. Step 5: Solve for x
   x = 121,842,883,600/158,978
6. Step 6: Final answer
   x = 766,413.49