Finding the Third Proportional to 812,478 and 1,782,492

Step by Step Solution

1. Step 1: Write the proportion equation
   812,478 : 1,782,492 = 1,782,492 : x
2. Step 2: Convert to fraction form
   812,478/1,782,492 = 1,782,492/x
3. Step 3: Cross multiply
   812,478x = 1,782,492 × 1,782,492
4. Step 4: Simplify right side
   812,478x = 3,177,277,730,064
5. Step 5: Solve for x
   x = 3,177,277,730,064/812,478
6. Step 6: Final answer
   x = 3,910,601.55