Finding the Third Proportional to 3,706,416 and 8,121,420

Step by Step Solution

1. Step 1: Write the proportion equation
   3,706,416 : 8,121,420 = 8,121,420 : x
2. Step 2: Convert to fraction form
   3,706,416/8,121,420 = 8,121,420/x
3. Step 3: Cross multiply
   3,706,416x = 8,121,420 × 8,121,420
4. Step 4: Simplify right side
   3,706,416x = 65,957,462,816,400
5. Step 5: Solve for x
   x = 65,957,462,816,400/3,706,416
6. Step 6: Final answer
   x = 17,795,482.97