Finding the Third Proportional to 19,802,686 and 31,509,968

Step by Step Solution

1. Step 1: Write the proportion equation
   19,802,686 : 31,509,968 = 31,509,968 : x
2. Step 2: Convert to fraction form
   19,802,686/31,509,968 = 31,509,968/x
3. Step 3: Cross multiply
   19,802,686x = 31,509,968 × 31,509,968
4. Step 4: Simplify right side
   19,802,686x = 992,878,083,361,024
5. Step 5: Solve for x
   x = 992,878,083,361,024/19,802,686
6. Step 6: Final answer
   x = 50,138,556.12