Finding the Third Proportional to 620,154 and 905,628

Step by Step Solution

1. Step 1: Write the proportion equation
   620,154 : 905,628 = 905,628 : x
2. Step 2: Convert to fraction form
   620,154/905,628 = 905,628/x
3. Step 3: Cross multiply
   620,154x = 905,628 × 905,628
4. Step 4: Simplify right side
   620,154x = 820,162,074,384
5. Step 5: Solve for x
   x = 820,162,074,384/620,154
6. Step 6: Final answer
   x = 1,322,513.56