Finding the Third Proportional to 857,636 and 1,262,690

Step by Step Solution

1. Step 1: Write the proportion equation
   857,636 : 1,262,690 = 1,262,690 : x
2. Step 2: Convert to fraction form
   857,636/1,262,690 = 1,262,690/x
3. Step 3: Cross multiply
   857,636x = 1,262,690 × 1,262,690
4. Step 4: Simplify right side
   857,636x = 1,594,386,036,100
5. Step 5: Solve for x
   x = 1,594,386,036,100/857,636
6. Step 6: Final answer
   x = 1,859,047.47