Finding the Third Proportional to 5,553,290 and 8,389,105

Step by Step Solution

1. Step 1: Write the proportion equation
   5,553,290 : 8,389,105 = 8,389,105 : x
2. Step 2: Convert to fraction form
   5,553,290/8,389,105 = 8,389,105/x
3. Step 3: Cross multiply
   5,553,290x = 8,389,105 × 8,389,105
4. Step 4: Simplify right side
   5,553,290x = 70,377,082,701,025
5. Step 5: Solve for x
   x = 70,377,082,701,025/5,553,290
6. Step 6: Final answer
   x = 12,673,042.95