Finding the Third Proportional to 302,805 and 636,963.75

Step by Step Solution

1. Step 1: Write the proportion equation
   302,805 : 636,963.75 = 636,963.75 : x
2. Step 2: Convert to fraction form
   302,805/636,963.75 = 636,963.75/x
3. Step 3: Cross multiply
   302,805x = 636,963.75 × 636,963.75
4. Step 4: Simplify right side
   302,805x = 405,722,818,814.06
5. Step 5: Solve for x
   x = 405,722,818,814.06/302,805
6. Step 6: Final answer
   x = 1,339,881.50