Finding the Third Proportional to 839,214 and 1,290,672

Step by Step Solution

1. Step 1: Write the proportion equation
   839,214 : 1,290,672 = 1,290,672 : x
2. Step 2: Convert to fraction form
   839,214/1,290,672 = 1,290,672/x
3. Step 3: Cross multiply
   839,214x = 1,290,672 × 1,290,672
4. Step 4: Simplify right side
   839,214x = 1,665,834,211,584
5. Step 5: Solve for x
   x = 1,665,834,211,584/839,214
6. Step 6: Final answer
   x = 1,984,993.35