Finding the Third Proportional to 284,556 and 428,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   284,556 : 428,710.50 = 428,710.50 : x
2. Step 2: Convert to fraction form
   284,556/428,710.50 = 428,710.50/x
3. Step 3: Cross multiply
   284,556x = 428,710.50 × 428,710.50
4. Step 4: Simplify right side
   284,556x = 183,792,692,810.25
5. Step 5: Solve for x
   x = 183,792,692,810.25/284,556
6. Step 6: Final answer
   x = 645,892.87