Finding the Third Proportional to 839,129.50 and 1,290,549

Step by Step Solution

1. Step 1: Write the proportion equation
   839,129.50 : 1,290,549 = 1,290,549 : x
2. Step 2: Convert to fraction form
   839,129.50/1,290,549 = 1,290,549/x
3. Step 3: Cross multiply
   839,129.50x = 1,290,549 × 1,290,549
4. Step 4: Simplify right side
   839,129.50x = 1,665,516,721,401
5. Step 5: Solve for x
   x = 1,665,516,721,401/839,129.50
6. Step 6: Final answer
   x = 1,984,814.88