Finding the Third Proportional to 839,140 and 1,290,566

Step by Step Solution

1. Step 1: Write the proportion equation
   839,140 : 1,290,566 = 1,290,566 : x
2. Step 2: Convert to fraction form
   839,140/1,290,566 = 1,290,566/x
3. Step 3: Cross multiply
   839,140x = 1,290,566 × 1,290,566
4. Step 4: Simplify right side
   839,140x = 1,665,560,600,356
5. Step 5: Solve for x
   x = 1,665,560,600,356/839,140
6. Step 6: Final answer
   x = 1,984,842.34