Finding the Third Proportional to 812,218 and 1,786,436

Step by Step Solution

1. Step 1: Write the proportion equation
   812,218 : 1,786,436 = 1,786,436 : x
2. Step 2: Convert to fraction form
   812,218/1,786,436 = 1,786,436/x
3. Step 3: Cross multiply
   812,218x = 1,786,436 × 1,786,436
4. Step 4: Simplify right side
   812,218x = 3,191,353,582,096
5. Step 5: Solve for x
   x = 3,191,353,582,096/812,218
6. Step 6: Final answer
   x = 3,929,183.52