Finding the Third Proportional to 284,522 and 621,540

Step by Step Solution

1. Step 1: Write the proportion equation
   284,522 : 621,540 = 621,540 : x
2. Step 2: Convert to fraction form
   284,522/621,540 = 621,540/x
3. Step 3: Cross multiply
   284,522x = 621,540 × 621,540
4. Step 4: Simplify right side
   284,522x = 386,311,971,600
5. Step 5: Solve for x
   x = 386,311,971,600/284,522
6. Step 6: Final answer
   x = 1,357,757.82