Finding the Third Proportional to 839,213 and 1,287,802

Step by Step Solution

1. Step 1: Write the proportion equation
   839,213 : 1,287,802 = 1,287,802 : x
2. Step 2: Convert to fraction form
   839,213/1,287,802 = 1,287,802/x
3. Step 3: Cross multiply
   839,213x = 1,287,802 × 1,287,802
4. Step 4: Simplify right side
   839,213x = 1,658,433,991,204
5. Step 5: Solve for x
   x = 1,658,433,991,204/839,213
6. Step 6: Final answer
   x = 1,976,177.67