Finding the Third Proportional to 8,216,744 and 12,822,542.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216,744 : 12,822,542.50 = 12,822,542.50 : x
2. Step 2: Convert to fraction form
   8,216,744/12,822,542.50 = 12,822,542.50/x
3. Step 3: Cross multiply
   8,216,744x = 12,822,542.50 × 12,822,542.50
4. Step 4: Simplify right side
   8,216,744x = 164,417,596,164,306.25
5. Step 5: Solve for x
   x = 164,417,596,164,306.25/8,216,744
6. Step 6: Final answer
   x = 20,010,066.78