Finding the Third Proportional to 8,636,740 and 12,907,510

Step by Step Solution

1. Step 1: Write the proportion equation
   8,636,740 : 12,907,510 = 12,907,510 : x
2. Step 2: Convert to fraction form
   8,636,740/12,907,510 = 12,907,510/x
3. Step 3: Cross multiply
   8,636,740x = 12,907,510 × 12,907,510
4. Step 4: Simplify right side
   8,636,740x = 166,603,814,400,100
5. Step 5: Solve for x
   x = 166,603,814,400,100/8,636,740
6. Step 6: Final answer
   x = 19,290,127.34