Finding the Third Proportional to 309,162 and 671,199

Step by Step Solution

1. Step 1: Write the proportion equation
   309,162 : 671,199 = 671,199 : x
2. Step 2: Convert to fraction form
   309,162/671,199 = 671,199/x
3. Step 3: Cross multiply
   309,162x = 671,199 × 671,199
4. Step 4: Simplify right side
   309,162x = 450,508,097,601
5. Step 5: Solve for x
   x = 450,508,097,601/309,162
6. Step 6: Final answer
   x = 1,457,191.04