Finding the Third Proportional to 8,216,738 and 12,822,533.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216,738 : 12,822,533.50 = 12,822,533.50 : x
2. Step 2: Convert to fraction form
   8,216,738/12,822,533.50 = 12,822,533.50/x
3. Step 3: Cross multiply
   8,216,738x = 12,822,533.50 × 12,822,533.50
4. Step 4: Simplify right side
   8,216,738x = 164,417,365,358,622.25
5. Step 5: Solve for x
   x = 164,417,365,358,622.25/8,216,738
6. Step 6: Final answer
   x = 20,010,053.30