Finding the Third Proportional to 915,678 and 1,400,742

Step by Step Solution

1. Step 1: Write the proportion equation
   915,678 : 1,400,742 = 1,400,742 : x
2. Step 2: Convert to fraction form
   915,678/1,400,742 = 1,400,742/x
3. Step 3: Cross multiply
   915,678x = 1,400,742 × 1,400,742
4. Step 4: Simplify right side
   915,678x = 1,962,078,150,564
5. Step 5: Solve for x
   x = 1,962,078,150,564/915,678
6. Step 6: Final answer
   x = 2,142,759.96