Finding the Third Proportional to 4,644,990 and 9,476,604

Step by Step Solution

1. Step 1: Write the proportion equation
   4,644,990 : 9,476,604 = 9,476,604 : x
2. Step 2: Convert to fraction form
   4,644,990/9,476,604 = 9,476,604/x
3. Step 3: Cross multiply
   4,644,990x = 9,476,604 × 9,476,604
4. Step 4: Simplify right side
   4,644,990x = 89,806,023,372,816
5. Step 5: Solve for x
   x = 89,806,023,372,816/4,644,990
6. Step 6: Final answer
   x = 19,333,954.08