Finding the Third Proportional to 371,978 and 810,387

Step by Step Solution

1. Step 1: Write the proportion equation
   371,978 : 810,387 = 810,387 : x
2. Step 2: Convert to fraction form
   371,978/810,387 = 810,387/x
3. Step 3: Cross multiply
   371,978x = 810,387 × 810,387
4. Step 4: Simplify right side
   371,978x = 656,727,089,769
5. Step 5: Solve for x
   x = 656,727,089,769/371,978
6. Step 6: Final answer
   x = 1,765,499.81