Finding the Third Proportional to 285,522 and 621,892

Step by Step Solution

1. Step 1: Write the proportion equation
   285,522 : 621,892 = 621,892 : x
2. Step 2: Convert to fraction form
   285,522/621,892 = 621,892/x
3. Step 3: Cross multiply
   285,522x = 621,892 × 621,892
4. Step 4: Simplify right side
   285,522x = 386,749,659,664
5. Step 5: Solve for x
   x = 386,749,659,664/285,522
6. Step 6: Final answer
   x = 1,354,535.41