Finding the Third Proportional to 488,952 and 777,978

Step by Step Solution

1. Step 1: Write the proportion equation
   488,952 : 777,978 = 777,978 : x
2. Step 2: Convert to fraction form
   488,952/777,978 = 777,978/x
3. Step 3: Cross multiply
   488,952x = 777,978 × 777,978
4. Step 4: Simplify right side
   488,952x = 605,249,768,484
5. Step 5: Solve for x
   x = 605,249,768,484/488,952
6. Step 6: Final answer
   x = 1,237,851.09