Finding the Third Proportional to 978,620 and 1,378,119

Step by Step Solution

1. Step 1: Write the proportion equation
   978,620 : 1,378,119 = 1,378,119 : x
2. Step 2: Convert to fraction form
   978,620/1,378,119 = 1,378,119/x
3. Step 3: Cross multiply
   978,620x = 1,378,119 × 1,378,119
4. Step 4: Simplify right side
   978,620x = 1,899,211,978,161
5. Step 5: Solve for x
   x = 1,899,211,978,161/978,620
6. Step 6: Final answer
   x = 1,940,704.23