Finding the Third Proportional to 3,661,686 and 7,974,312

Step by Step Solution

1. Step 1: Write the proportion equation
   3,661,686 : 7,974,312 = 7,974,312 : x
2. Step 2: Convert to fraction form
   3,661,686/7,974,312 = 7,974,312/x
3. Step 3: Cross multiply
   3,661,686x = 7,974,312 × 7,974,312
4. Step 4: Simplify right side
   3,661,686x = 63,589,651,873,344
5. Step 5: Solve for x
   x = 63,589,651,873,344/3,661,686
6. Step 6: Final answer
   x = 17,366,221.97