Finding the Third Proportional to 890,408 and 1,245,540

Step by Step Solution

1. Step 1: Write the proportion equation
   890,408 : 1,245,540 = 1,245,540 : x
2. Step 2: Convert to fraction form
   890,408/1,245,540 = 1,245,540/x
3. Step 3: Cross multiply
   890,408x = 1,245,540 × 1,245,540
4. Step 4: Simplify right side
   890,408x = 1,551,369,891,600
5. Step 5: Solve for x
   x = 1,551,369,891,600/890,408
6. Step 6: Final answer
   x = 1,742,313.51