Finding the Third Proportional to 640,160 and 1,388,896

Step by Step Solution

1. Step 1: Write the proportion equation
   640,160 : 1,388,896 = 1,388,896 : x
2. Step 2: Convert to fraction form
   640,160/1,388,896 = 1,388,896/x
3. Step 3: Cross multiply
   640,160x = 1,388,896 × 1,388,896
4. Step 4: Simplify right side
   640,160x = 1,929,032,098,816
5. Step 5: Solve for x
   x = 1,929,032,098,816/640,160
6. Step 6: Final answer
   x = 3,013,359.31