Finding the Third Proportional to 9,920,634 and 21,258,432

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920,634 : 21,258,432 = 21,258,432 : x
2. Step 2: Convert to fraction form
   9,920,634/21,258,432 = 21,258,432/x
3. Step 3: Cross multiply
   9,920,634x = 21,258,432 × 21,258,432
4. Step 4: Simplify right side
   9,920,634x = 451,920,931,098,624
5. Step 5: Solve for x
   x = 451,920,931,098,624/9,920,634
6. Step 6: Final answer
   x = 45,553,634.08