Finding the Third Proportional to 9,968,961,678 and 21,272,217,564

Step by Step Solution

1. Step 1: Write the proportion equation
   9,968,961,678 : 21,272,217,564 = 21,272,217,564 : x
2. Step 2: Convert to fraction form
   9,968,961,678/21,272,217,564 = 21,272,217,564/x
3. Step 3: Cross multiply
   9,968,961,678x = 21,272,217,564 × 21,272,217,564
4. Step 4: Simplify right side
   9,968,961,678x = 452,507,240,090,150,109,184
5. Step 5: Solve for x
   x = 452,507,240,090,150,109,184/9,968,961,678
6. Step 6: Final answer
   x = 45,391,611,955.81