Finding the Third Proportional to 10,215,564 and 21,980,996

Step by Step Solution

1. Step 1: Write the proportion equation
   10,215,564 : 21,980,996 = 21,980,996 : x
2. Step 2: Convert to fraction form
   10,215,564/21,980,996 = 21,980,996/x
3. Step 3: Cross multiply
   10,215,564x = 21,980,996 × 21,980,996
4. Step 4: Simplify right side
   10,215,564x = 483,164,185,152,016
5. Step 5: Solve for x
   x = 483,164,185,152,016/10,215,564
6. Step 6: Final answer
   x = 47,296,868.30