Finding the Third Proportional to 212,907 and 465,664.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,907 : 465,664.50 = 465,664.50 : x
2. Step 2: Convert to fraction form
   212,907/465,664.50 = 465,664.50/x
3. Step 3: Cross multiply
   212,907x = 465,664.50 × 465,664.50
4. Step 4: Simplify right side
   212,907x = 216,843,426,560.25
5. Step 5: Solve for x
   x = 216,843,426,560.25/212,907
6. Step 6: Final answer
   x = 1,018,488.95