Finding the Third Proportional to 978,911 and 1,378,551

Step by Step Solution

1. Step 1: Write the proportion equation
   978,911 : 1,378,551 = 1,378,551 : x
2. Step 2: Convert to fraction form
   978,911/1,378,551 = 1,378,551/x
3. Step 3: Cross multiply
   978,911x = 1,378,551 × 1,378,551
4. Step 4: Simplify right side
   978,911x = 1,900,402,859,601
5. Step 5: Solve for x
   x = 1,900,402,859,601/978,911
6. Step 6: Final answer
   x = 1,941,343.86