Finding the Third Proportional to 2,128,120 and 4,669,771

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,120 : 4,669,771 = 4,669,771 : x
2. Step 2: Convert to fraction form
   2,128,120/4,669,771 = 4,669,771/x
3. Step 3: Cross multiply
   2,128,120x = 4,669,771 × 4,669,771
4. Step 4: Simplify right side
   2,128,120x = 21,806,761,192,441
5. Step 5: Solve for x
   x = 21,806,761,192,441/2,128,120
6. Step 6: Final answer
   x = 10,246,960.32