Finding the Third Proportional to 8,269,215,838 and 12,710,366,718

Step by Step Solution

1. Step 1: Write the proportion equation
   8,269,215,838 : 12,710,366,718 = 12,710,366,718 : x
2. Step 2: Convert to fraction form
   8,269,215,838/12,710,366,718 = 12,710,366,718/x
3. Step 3: Cross multiply
   8,269,215,838x = 12,710,366,718 × 12,710,366,718
4. Step 4: Simplify right side
   8,269,215,838x = 161,553,422,106,042,105,856
5. Step 5: Solve for x
   x = 161,553,422,106,042,105,856/8,269,215,838
6. Step 6: Final answer
   x = 19,536,728,182.09