Finding the Third Proportional to 8,216,742 and 12,822,539.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216,742 : 12,822,539.50 = 12,822,539.50 : x
2. Step 2: Convert to fraction form
   8,216,742/12,822,539.50 = 12,822,539.50/x
3. Step 3: Cross multiply
   8,216,742x = 12,822,539.50 × 12,822,539.50
4. Step 4: Simplify right side
   8,216,742x = 164,417,519,229,060.25
5. Step 5: Solve for x
   x = 164,417,519,229,060.25/8,216,742
6. Step 6: Final answer
   x = 20,010,062.29