Finding the Third Proportional to 812,211 and 1,786,422

Step by Step Solution

1. Step 1: Write the proportion equation
   812,211 : 1,786,422 = 1,786,422 : x
2. Step 2: Convert to fraction form
   812,211/1,786,422 = 1,786,422/x
3. Step 3: Cross multiply
   812,211x = 1,786,422 × 1,786,422
4. Step 4: Simplify right side
   812,211x = 3,191,303,562,084
5. Step 5: Solve for x
   x = 3,191,303,562,084/812,211
6. Step 6: Final answer
   x = 3,929,155.80