Finding the Third Proportional to 302,685.50 and 636,741

Step by Step Solution

1. Step 1: Write the proportion equation
   302,685.50 : 636,741 = 636,741 : x
2. Step 2: Convert to fraction form
   302,685.50/636,741 = 636,741/x
3. Step 3: Cross multiply
   302,685.50x = 636,741 × 636,741
4. Step 4: Simplify right side
   302,685.50x = 405,439,101,081
5. Step 5: Solve for x
   x = 405,439,101,081/302,685.50
6. Step 6: Final answer
   x = 1,339,473.15