Finding the Third Proportional to 10,398,370 and 21,111,670

Step by Step Solution

1. Step 1: Write the proportion equation
   10,398,370 : 21,111,670 = 21,111,670 : x
2. Step 2: Convert to fraction form
   10,398,370/21,111,670 = 21,111,670/x
3. Step 3: Cross multiply
   10,398,370x = 21,111,670 × 21,111,670
4. Step 4: Simplify right side
   10,398,370x = 445,702,610,188,900
5. Step 5: Solve for x
   x = 445,702,610,188,900/10,398,370
6. Step 6: Final answer
   x = 42,862,738.12