Finding the Third Proportional to 621,702 and 912,150

Step by Step Solution

1. Step 1: Write the proportion equation
   621,702 : 912,150 = 912,150 : x
2. Step 2: Convert to fraction form
   621,702/912,150 = 912,150/x
3. Step 3: Cross multiply
   621,702x = 912,150 × 912,150
4. Step 4: Simplify right side
   621,702x = 832,017,622,500
5. Step 5: Solve for x
   x = 832,017,622,500/621,702
6. Step 6: Final answer
   x = 1,338,290.09