Finding the Third Proportional to 12,847,321,289 and 19,640,241,162

Step by Step Solution

1. Step 1: Write the proportion equation
   12,847,321,289 : 19,640,241,162 = 19,640,241,162 : x
2. Step 2: Convert to fraction form
   12,847,321,289/19,640,241,162 = 19,640,241,162/x
3. Step 3: Cross multiply
   12,847,321,289x = 19,640,241,162 × 19,640,241,162
4. Step 4: Simplify right side
   12,847,321,289x = 385,739,072,901,519,114,240
5. Step 5: Solve for x
   x = 385,739,072,901,519,114,240/12,847,321,289
6. Step 6: Final answer
   x = 30,024,863,878.18