Finding the Third Proportional to 811,455 and 1,263,111

Step by Step Solution

1. Step 1: Write the proportion equation
   811,455 : 1,263,111 = 1,263,111 : x
2. Step 2: Convert to fraction form
   811,455/1,263,111 = 1,263,111/x
3. Step 3: Cross multiply
   811,455x = 1,263,111 × 1,263,111
4. Step 4: Simplify right side
   811,455x = 1,595,449,398,321
5. Step 5: Solve for x
   x = 1,595,449,398,321/811,455
6. Step 6: Final answer
   x = 1,966,158.81