Finding the Third Proportional to 900,686 and 1,978,522

Step by Step Solution

1. Step 1: Write the proportion equation
   900,686 : 1,978,522 = 1,978,522 : x
2. Step 2: Convert to fraction form
   900,686/1,978,522 = 1,978,522/x
3. Step 3: Cross multiply
   900,686x = 1,978,522 × 1,978,522
4. Step 4: Simplify right side
   900,686x = 3,914,549,304,484
5. Step 5: Solve for x
   x = 3,914,549,304,484/900,686
6. Step 6: Final answer
   x = 4,346,186.47