Finding the Third Proportional to 3,489,018 and 7,400,784

Step by Step Solution

1. Step 1: Write the proportion equation
   3,489,018 : 7,400,784 = 7,400,784 : x
2. Step 2: Convert to fraction form
   3,489,018/7,400,784 = 7,400,784/x
3. Step 3: Cross multiply
   3,489,018x = 7,400,784 × 7,400,784
4. Step 4: Simplify right side
   3,489,018x = 54,771,603,814,656
5. Step 5: Solve for x
   x = 54,771,603,814,656/3,489,018
6. Step 6: Final answer
   x = 15,698,286.40