Finding the Third Proportional to 5,086,628 and 7,128,892

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086,628 : 7,128,892 = 7,128,892 : x
2. Step 2: Convert to fraction form
   5,086,628/7,128,892 = 7,128,892/x
3. Step 3: Cross multiply
   5,086,628x = 7,128,892 × 7,128,892
4. Step 4: Simplify right side
   5,086,628x = 50,821,101,147,664
5. Step 5: Solve for x
   x = 50,821,101,147,664/5,086,628
6. Step 6: Final answer
   x = 9,991,118.11