Finding the Third Proportional to 636,144 and 1,384,490

Step by Step Solution

1. Step 1: Write the proportion equation
   636,144 : 1,384,490 = 1,384,490 : x
2. Step 2: Convert to fraction form
   636,144/1,384,490 = 1,384,490/x
3. Step 3: Cross multiply
   636,144x = 1,384,490 × 1,384,490
4. Step 4: Simplify right side
   636,144x = 1,916,812,560,100
5. Step 5: Solve for x
   x = 1,916,812,560,100/636,144
6. Step 6: Final answer
   x = 3,013,174.00