Finding the Third Proportional to 812,356 and 1,782,208

Step by Step Solution

1. Step 1: Write the proportion equation
   812,356 : 1,782,208 = 1,782,208 : x
2. Step 2: Convert to fraction form
   812,356/1,782,208 = 1,782,208/x
3. Step 3: Cross multiply
   812,356x = 1,782,208 × 1,782,208
4. Step 4: Simplify right side
   812,356x = 3,176,265,355,264
5. Step 5: Solve for x
   x = 3,176,265,355,264/812,356
6. Step 6: Final answer
   x = 3,909,942.63