Finding the Third Proportional to 3,317,790 and 7,278,396

Step by Step Solution

1. Step 1: Write the proportion equation
   3,317,790 : 7,278,396 = 7,278,396 : x
2. Step 2: Convert to fraction form
   3,317,790/7,278,396 = 7,278,396/x
3. Step 3: Cross multiply
   3,317,790x = 7,278,396 × 7,278,396
4. Step 4: Simplify right side
   3,317,790x = 52,975,048,332,816
5. Step 5: Solve for x
   x = 52,975,048,332,816/3,317,790
6. Step 6: Final answer
   x = 15,966,968.47