Finding the Third Proportional to 10,387,902,057 and 21,064,859,697

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387,902,057 : 21,064,859,697 = 21,064,859,697 : x
2. Step 2: Convert to fraction form
   10,387,902,057/21,064,859,697 = 21,064,859,697/x
3. Step 3: Cross multiply
   10,387,902,057x = 21,064,859,697 × 21,064,859,697
4. Step 4: Simplify right side
   10,387,902,057x = 443,728,314,054,294,962,176
5. Step 5: Solve for x
   x = 443,728,314,054,294,962,176/10,387,902,057
6. Step 6: Final answer
   x = 42,715,873,871.31