Finding the Third Proportional to 864,436 and 1,268,628

Step by Step Solution

1. Step 1: Write the proportion equation
   864,436 : 1,268,628 = 1,268,628 : x
2. Step 2: Convert to fraction form
   864,436/1,268,628 = 1,268,628/x
3. Step 3: Cross multiply
   864,436x = 1,268,628 × 1,268,628
4. Step 4: Simplify right side
   864,436x = 1,609,417,002,384
5. Step 5: Solve for x
   x = 1,609,417,002,384/864,436
6. Step 6: Final answer
   x = 1,861,811.63