Finding the Third Proportional to 4,914,530 and 10,221,428

Step by Step Solution

1. Step 1: Write the proportion equation
   4,914,530 : 10,221,428 = 10,221,428 : x
2. Step 2: Convert to fraction form
   4,914,530/10,221,428 = 10,221,428/x
3. Step 3: Cross multiply
   4,914,530x = 10,221,428 × 10,221,428
4. Step 4: Simplify right side
   4,914,530x = 104,477,590,359,184
5. Step 5: Solve for x
   x = 104,477,590,359,184/4,914,530
6. Step 6: Final answer
   x = 21,258,918.02