Finding the Third Proportional to 900,685 and 1,978,517

Step by Step Solution

1. Step 1: Write the proportion equation
   900,685 : 1,978,517 = 1,978,517 : x
2. Step 2: Convert to fraction form
   900,685/1,978,517 = 1,978,517/x
3. Step 3: Cross multiply
   900,685x = 1,978,517 × 1,978,517
4. Step 4: Simplify right side
   900,685x = 3,914,529,519,289
5. Step 5: Solve for x
   x = 3,914,529,519,289/900,685
6. Step 6: Final answer
   x = 4,346,169.33