Finding the Third Proportional to 20,266,519,668 and 42,210,486,851

Step by Step Solution

1. Step 1: Write the proportion equation
   20,266,519,668 : 42,210,486,851 = 42,210,486,851 : x
2. Step 2: Convert to fraction form
   20,266,519,668/42,210,486,851 = 42,210,486,851/x
3. Step 3: Cross multiply
   20,266,519,668x = 42,210,486,851 × 42,210,486,851
4. Step 4: Simplify right side
   20,266,519,668x = 1,781,725,200,198,443,991,040
5. Step 5: Solve for x
   x = 1,781,725,200,198,443,991,040/20,266,519,668
6. Step 6: Final answer
   x = 87,914,710,043.27