Finding the Third Proportional to 640,356 and 1,380,024

Step by Step Solution

1. Step 1: Write the proportion equation
   640,356 : 1,380,024 = 1,380,024 : x
2. Step 2: Convert to fraction form
   640,356/1,380,024 = 1,380,024/x
3. Step 3: Cross multiply
   640,356x = 1,380,024 × 1,380,024
4. Step 4: Simplify right side
   640,356x = 1,904,466,240,576
5. Step 5: Solve for x
   x = 1,904,466,240,576/640,356
6. Step 6: Final answer
   x = 2,974,074.17