Finding the Third Proportional to 900,689 and 1,978,525

Step by Step Solution

1. Step 1: Write the proportion equation
   900,689 : 1,978,525 = 1,978,525 : x
2. Step 2: Convert to fraction form
   900,689/1,978,525 = 1,978,525/x
3. Step 3: Cross multiply
   900,689x = 1,978,525 × 1,978,525
4. Step 4: Simplify right side
   900,689x = 3,914,561,175,625
5. Step 5: Solve for x
   x = 3,914,561,175,625/900,689
6. Step 6: Final answer
   x = 4,346,185.17