Finding the Third Proportional to 9,789,640 and 20,996,420

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789,640 : 20,996,420 = 20,996,420 : x
2. Step 2: Convert to fraction form
   9,789,640/20,996,420 = 20,996,420/x
3. Step 3: Cross multiply
   9,789,640x = 20,996,420 × 20,996,420
4. Step 4: Simplify right side
   9,789,640x = 440,849,652,816,400
5. Step 5: Solve for x
   x = 440,849,652,816,400/9,789,640
6. Step 6: Final answer
   x = 45,032,263.99