Finding the Third Proportional to 331,245 and 714,978

Step by Step Solution

1. Step 1: Write the proportion equation
   331,245 : 714,978 = 714,978 : x
2. Step 2: Convert to fraction form
   331,245/714,978 = 714,978/x
3. Step 3: Cross multiply
   331,245x = 714,978 × 714,978
4. Step 4: Simplify right side
   331,245x = 511,193,540,484
5. Step 5: Solve for x
   x = 511,193,540,484/331,245
6. Step 6: Final answer
   x = 1,543,249.08