Finding the Third Proportional to 640,240 and 1,373,792

Step by Step Solution

1. Step 1: Write the proportion equation
   640,240 : 1,373,792 = 1,373,792 : x
2. Step 2: Convert to fraction form
   640,240/1,373,792 = 1,373,792/x
3. Step 3: Cross multiply
   640,240x = 1,373,792 × 1,373,792
4. Step 4: Simplify right side
   640,240x = 1,887,304,459,264
5. Step 5: Solve for x
   x = 1,887,304,459,264/640,240
6. Step 6: Final answer
   x = 2,947,807.79