Finding the Third Proportional to 9,920,569 and 21,258,314

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920,569 : 21,258,314 = 21,258,314 : x
2. Step 2: Convert to fraction form
   9,920,569/21,258,314 = 21,258,314/x
3. Step 3: Cross multiply
   9,920,569x = 21,258,314 × 21,258,314
4. Step 4: Simplify right side
   9,920,569x = 451,915,914,122,596
5. Step 5: Solve for x
   x = 451,915,914,122,596/9,920,569
6. Step 6: Final answer
   x = 45,553,426.84