Finding the Third Proportional to 640,184 and 1,398,484

Step by Step Solution

1. Step 1: Write the proportion equation
   640,184 : 1,398,484 = 1,398,484 : x
2. Step 2: Convert to fraction form
   640,184/1,398,484 = 1,398,484/x
3. Step 3: Cross multiply
   640,184x = 1,398,484 × 1,398,484
4. Step 4: Simplify right side
   640,184x = 1,955,757,498,256
5. Step 5: Solve for x
   x = 1,955,757,498,256/640,184
6. Step 6: Final answer
   x = 3,054,992.78