Finding the Third Proportional to 2,128,620 and 4,729,644

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,620 : 4,729,644 = 4,729,644 : x
2. Step 2: Convert to fraction form
   2,128,620/4,729,644 = 4,729,644/x
3. Step 3: Cross multiply
   2,128,620x = 4,729,644 × 4,729,644
4. Step 4: Simplify right side
   2,128,620x = 22,369,532,366,736
5. Step 5: Solve for x
   x = 22,369,532,366,736/2,128,620
6. Step 6: Final answer
   x = 10,508,936.48