Finding the Third Proportional to 309,676.50 and 436,077

Step by Step Solution

1. Step 1: Write the proportion equation
   309,676.50 : 436,077 = 436,077 : x
2. Step 2: Convert to fraction form
   309,676.50/436,077 = 436,077/x
3. Step 3: Cross multiply
   309,676.50x = 436,077 × 436,077
4. Step 4: Simplify right side
   309,676.50x = 190,163,149,929
5. Step 5: Solve for x
   x = 190,163,149,929/309,676.50
6. Step 6: Final answer
   x = 614,070.33