Finding the Third Proportional to 212,697 and 505,822.50

Step by Step Solution

1. Step 1: Write the proportion equation
   212,697 : 505,822.50 = 505,822.50 : x
2. Step 2: Convert to fraction form
   212,697/505,822.50 = 505,822.50/x
3. Step 3: Cross multiply
   212,697x = 505,822.50 × 505,822.50
4. Step 4: Simplify right side
   212,697x = 255,856,401,506.25
5. Step 5: Solve for x
   x = 255,856,401,506.25/212,697
6. Step 6: Final answer
   x = 1,202,914.95