Finding the Third Proportional to 8,380,429 and 12,814,311

Step by Step Solution

1. Step 1: Write the proportion equation
   8,380,429 : 12,814,311 = 12,814,311 : x
2. Step 2: Convert to fraction form
   8,380,429/12,814,311 = 12,814,311/x
3. Step 3: Cross multiply
   8,380,429x = 12,814,311 × 12,814,311
4. Step 4: Simplify right side
   8,380,429x = 164,206,566,404,721
5. Step 5: Solve for x
   x = 164,206,566,404,721/8,380,429
6. Step 6: Final answer
   x = 19,594,052.57