Finding the Third Proportional to 6,436,686 and 13,641,012

Step by Step Solution

1. Step 1: Write the proportion equation
   6,436,686 : 13,641,012 = 13,641,012 : x
2. Step 2: Convert to fraction form
   6,436,686/13,641,012 = 13,641,012/x
3. Step 3: Cross multiply
   6,436,686x = 13,641,012 × 13,641,012
4. Step 4: Simplify right side
   6,436,686x = 186,077,208,384,144
5. Step 5: Solve for x
   x = 186,077,208,384,144/6,436,686
6. Step 6: Final answer
   x = 28,908,852.85