Finding the Third Proportional to 816,426 and 1,287,252

Step by Step Solution

1. Step 1: Write the proportion equation
   816,426 : 1,287,252 = 1,287,252 : x
2. Step 2: Convert to fraction form
   816,426/1,287,252 = 1,287,252/x
3. Step 3: Cross multiply
   816,426x = 1,287,252 × 1,287,252
4. Step 4: Simplify right side
   816,426x = 1,657,017,711,504
5. Step 5: Solve for x
   x = 1,657,017,711,504/816,426
6. Step 6: Final answer
   x = 2,029,599.39