Finding the Third Proportional to 978,903 and 1,378,539

Step by Step Solution

1. Step 1: Write the proportion equation
   978,903 : 1,378,539 = 1,378,539 : x
2. Step 2: Convert to fraction form
   978,903/1,378,539 = 1,378,539/x
3. Step 3: Cross multiply
   978,903x = 1,378,539 × 1,378,539
4. Step 4: Simplify right side
   978,903x = 1,900,369,774,521
5. Step 5: Solve for x
   x = 1,900,369,774,521/978,903
6. Step 6: Final answer
   x = 1,941,325.93