Finding the Third Proportional to 3,790,216 and 8,218,790

Step by Step Solution

1. Step 1: Write the proportion equation
   3,790,216 : 8,218,790 = 8,218,790 : x
2. Step 2: Convert to fraction form
   3,790,216/8,218,790 = 8,218,790/x
3. Step 3: Cross multiply
   3,790,216x = 8,218,790 × 8,218,790
4. Step 4: Simplify right side
   3,790,216x = 67,548,509,064,100
5. Step 5: Solve for x
   x = 67,548,509,064,100/3,790,216
6. Step 6: Final answer
   x = 17,821,809.91