Finding the Third Proportional to 812,212 and 1,786,424

Step by Step Solution

1. Step 1: Write the proportion equation
   812,212 : 1,786,424 = 1,786,424 : x
2. Step 2: Convert to fraction form
   812,212/1,786,424 = 1,786,424/x
3. Step 3: Cross multiply
   812,212x = 1,786,424 × 1,786,424
4. Step 4: Simplify right side
   812,212x = 3,191,310,707,776
5. Step 5: Solve for x
   x = 3,191,310,707,776/812,212
6. Step 6: Final answer
   x = 3,929,159.76