Finding the Third Proportional to 309,672 and 436,073

Step by Step Solution

1. Step 1: Write the proportion equation
   309,672 : 436,073 = 436,073 : x
2. Step 2: Convert to fraction form
   309,672/436,073 = 436,073/x
3. Step 3: Cross multiply
   309,672x = 436,073 × 436,073
4. Step 4: Simplify right side
   309,672x = 190,159,661,329
5. Step 5: Solve for x
   x = 190,159,661,329/309,672
6. Step 6: Final answer
   x = 614,067.99