Finding the Third Proportional to 644,380 and 1,455,880

Step by Step Solution

1. Step 1: Write the proportion equation
   644,380 : 1,455,880 = 1,455,880 : x
2. Step 2: Convert to fraction form
   644,380/1,455,880 = 1,455,880/x
3. Step 3: Cross multiply
   644,380x = 1,455,880 × 1,455,880
4. Step 4: Simplify right side
   644,380x = 2,119,586,574,400
5. Step 5: Solve for x
   x = 2,119,586,574,400/644,380
6. Step 6: Final answer
   x = 3,289,342.58