Finding the Third Proportional to 1,315,778 and 1,983,388

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315,778 : 1,983,388 = 1,983,388 : x
2. Step 2: Convert to fraction form
   1,315,778/1,983,388 = 1,983,388/x
3. Step 3: Cross multiply
   1,315,778x = 1,983,388 × 1,983,388
4. Step 4: Simplify right side
   1,315,778x = 3,933,827,958,544
5. Step 5: Solve for x
   x = 3,933,827,958,544/1,315,778
6. Step 6: Final answer
   x = 2,989,735.32