Finding the Third Proportional to 12,570,636 and 19,221,456

Step by Step Solution

1. Step 1: Write the proportion equation
   12,570,636 : 19,221,456 = 19,221,456 : x
2. Step 2: Convert to fraction form
   12,570,636/19,221,456 = 19,221,456/x
3. Step 3: Cross multiply
   12,570,636x = 19,221,456 × 19,221,456
4. Step 4: Simplify right side
   12,570,636x = 369,464,370,759,936
5. Step 5: Solve for x
   x = 369,464,370,759,936/12,570,636
6. Step 6: Final answer
   x = 29,391,064.28