Finding the Third Proportional to 505,145 and 799,730

Step by Step Solution

1. Step 1: Write the proportion equation
   505,145 : 799,730 = 799,730 : x
2. Step 2: Convert to fraction form
   505,145/799,730 = 799,730/x
3. Step 3: Cross multiply
   505,145x = 799,730 × 799,730
4. Step 4: Simplify right side
   505,145x = 639,568,072,900
5. Step 5: Solve for x
   x = 639,568,072,900/505,145
6. Step 6: Final answer
   x = 1,266,107.90