Finding the Third Proportional to 978,907 and 1,378,545

Step by Step Solution

1. Step 1: Write the proportion equation
   978,907 : 1,378,545 = 1,378,545 : x
2. Step 2: Convert to fraction form
   978,907/1,378,545 = 1,378,545/x
3. Step 3: Cross multiply
   978,907x = 1,378,545 × 1,378,545
4. Step 4: Simplify right side
   978,907x = 1,900,386,317,025
5. Step 5: Solve for x
   x = 1,900,386,317,025/978,907
6. Step 6: Final answer
   x = 1,941,334.89