Finding the Third Proportional to 4,486,326 and 9,784,678

Step by Step Solution

1. Step 1: Write the proportion equation
   4,486,326 : 9,784,678 = 9,784,678 : x
2. Step 2: Convert to fraction form
   4,486,326/9,784,678 = 9,784,678/x
3. Step 3: Cross multiply
   4,486,326x = 9,784,678 × 9,784,678
4. Step 4: Simplify right side
   4,486,326x = 95,739,923,563,684
5. Step 5: Solve for x
   x = 95,739,923,563,684/4,486,326
6. Step 6: Final answer
   x = 21,340,384.89