Finding the Third Proportional to 19,939,671 and 42,642,738

Step by Step Solution

1. Step 1: Write the proportion equation
   19,939,671 : 42,642,738 = 42,642,738 : x
2. Step 2: Convert to fraction form
   19,939,671/42,642,738 = 42,642,738/x
3. Step 3: Cross multiply
   19,939,671x = 42,642,738 × 42,642,738
4. Step 4: Simplify right side
   19,939,671x = 1,818,403,104,136,644
5. Step 5: Solve for x
   x = 1,818,403,104,136,644/19,939,671
6. Step 6: Final answer
   x = 91,195,241.09