Finding the Third Proportional to 12,920,496 and 18,819,900

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920,496 : 18,819,900 = 18,819,900 : x
2. Step 2: Convert to fraction form
   12,920,496/18,819,900 = 18,819,900/x
3. Step 3: Cross multiply
   12,920,496x = 18,819,900 × 18,819,900
4. Step 4: Simplify right side
   12,920,496x = 354,188,636,010,000
5. Step 5: Solve for x
   x = 354,188,636,010,000/12,920,496
6. Step 6: Final answer
   x = 27,412,928.73