Finding the Third Proportional to 864,434 and 1,268,606

Step by Step Solution

1. Step 1: Write the proportion equation
   864,434 : 1,268,606 = 1,268,606 : x
2. Step 2: Convert to fraction form
   864,434/1,268,606 = 1,268,606/x
3. Step 3: Cross multiply
   864,434x = 1,268,606 × 1,268,606
4. Step 4: Simplify right side
   864,434x = 1,609,361,183,236
5. Step 5: Solve for x
   x = 1,609,361,183,236/864,434
6. Step 6: Final answer
   x = 1,861,751.37