Finding the Third Proportional to 13,815,998,820 and 21,223,064,420

Step by Step Solution

1. Step 1: Write the proportion equation
   13,815,998,820 : 21,223,064,420 = 21,223,064,420 : x
2. Step 2: Convert to fraction form
   13,815,998,820/21,223,064,420 = 21,223,064,420/x
3. Step 3: Cross multiply
   13,815,998,820x = 21,223,064,420 × 21,223,064,420
4. Step 4: Simplify right side
   13,815,998,820x = 450,418,463,375,469,903,872
5. Step 5: Solve for x
   x = 450,418,463,375,469,903,872/13,815,998,820
6. Step 6: Final answer
   x = 32,601,223,352.99