Finding the Third Proportional to 419,991 and 921,630

Step by Step Solution

1. Step 1: Write the proportion equation
   419,991 : 921,630 = 921,630 : x
2. Step 2: Convert to fraction form
   419,991/921,630 = 921,630/x
3. Step 3: Cross multiply
   419,991x = 921,630 × 921,630
4. Step 4: Simplify right side
   419,991x = 849,401,856,900
5. Step 5: Solve for x
   x = 849,401,856,900/419,991
6. Step 6: Final answer
   x = 2,022,428.71