Finding the Third Proportional to 8,216,740 and 12,822,536

Step by Step Solution

1. Step 1: Write the proportion equation
   8,216,740 : 12,822,536 = 12,822,536 : x
2. Step 2: Convert to fraction form
   8,216,740/12,822,536 = 12,822,536/x
3. Step 3: Cross multiply
   8,216,740x = 12,822,536 × 12,822,536
4. Step 4: Simplify right side
   8,216,740x = 164,417,429,471,296
5. Step 5: Solve for x
   x = 164,417,429,471,296/8,216,740
6. Step 6: Final answer
   x = 20,010,056.24