Finding the Third Proportional to 640,368 and 1,380,048

Step by Step Solution

1. Step 1: Write the proportion equation
   640,368 : 1,380,048 = 1,380,048 : x
2. Step 2: Convert to fraction form
   640,368/1,380,048 = 1,380,048/x
3. Step 3: Cross multiply
   640,368x = 1,380,048 × 1,380,048
4. Step 4: Simplify right side
   640,368x = 1,904,532,482,304
5. Step 5: Solve for x
   x = 1,904,532,482,304/640,368
6. Step 6: Final answer
   x = 2,974,121.88