Finding the Third Proportional to 403,578 and 848,978

Step by Step Solution

1. Step 1: Write the proportion equation
   403,578 : 848,978 = 848,978 : x
2. Step 2: Convert to fraction form
   403,578/848,978 = 848,978/x
3. Step 3: Cross multiply
   403,578x = 848,978 × 848,978
4. Step 4: Simplify right side
   403,578x = 720,763,644,484
5. Step 5: Solve for x
   x = 720,763,644,484/403,578
6. Step 6: Final answer
   x = 1,785,933.93