Finding the Third Proportional to 419,978 and 921,610

Step by Step Solution

1. Step 1: Write the proportion equation
   419,978 : 921,610 = 921,610 : x
2. Step 2: Convert to fraction form
   419,978/921,610 = 921,610/x
3. Step 3: Cross multiply
   419,978x = 921,610 × 921,610
4. Step 4: Simplify right side
   419,978x = 849,364,992,100
5. Step 5: Solve for x
   x = 849,364,992,100/419,978
6. Step 6: Final answer
   x = 2,022,403.54