Finding the Third Proportional to 619,300 and 872,087

Step by Step Solution

1. Step 1: Write the proportion equation
   619,300 : 872,087 = 872,087 : x
2. Step 2: Convert to fraction form
   619,300/872,087 = 872,087/x
3. Step 3: Cross multiply
   619,300x = 872,087 × 872,087
4. Step 4: Simplify right side
   619,300x = 760,535,735,569
5. Step 5: Solve for x
   x = 760,535,735,569/619,300
6. Step 6: Final answer
   x = 1,228,057.06