Finding the Third Proportional to 9,974,784 and 21,816,128

Step by Step Solution

1. Step 1: Write the proportion equation
   9,974,784 : 21,816,128 = 21,816,128 : x
2. Step 2: Convert to fraction form
   9,974,784/21,816,128 = 21,816,128/x
3. Step 3: Cross multiply
   9,974,784x = 21,816,128 × 21,816,128
4. Step 4: Simplify right side
   9,974,784x = 475,943,440,912,384
5. Step 5: Solve for x
   x = 475,943,440,912,384/9,974,784
6. Step 6: Final answer
   x = 47,714,661.38