Finding the Third Proportional to 10,398,368 and 21,111,666

Step by Step Solution

1. Step 1: Write the proportion equation
   10,398,368 : 21,111,666 = 21,111,666 : x
2. Step 2: Convert to fraction form
   10,398,368/21,111,666 = 21,111,666/x
3. Step 3: Cross multiply
   10,398,368x = 21,111,666 × 21,111,666
4. Step 4: Simplify right side
   10,398,368x = 445,702,441,295,556
5. Step 5: Solve for x
   x = 445,702,441,295,556/10,398,368
6. Step 6: Final answer
   x = 42,862,730.12