Finding the Third Proportional to 9,920,558 and 21,258,292

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920,558 : 21,258,292 = 21,258,292 : x
2. Step 2: Convert to fraction form
   9,920,558/21,258,292 = 21,258,292/x
3. Step 3: Cross multiply
   9,920,558x = 21,258,292 × 21,258,292
4. Step 4: Simplify right side
   9,920,558x = 451,914,978,757,264
5. Step 5: Solve for x
   x = 451,914,978,757,264/9,920,558
6. Step 6: Final answer
   x = 45,553,383.06