Finding the Third Proportional to 643,870 and 1,271,525

Step by Step Solution

1. Step 1: Write the proportion equation
   643,870 : 1,271,525 = 1,271,525 : x
2. Step 2: Convert to fraction form
   643,870/1,271,525 = 1,271,525/x
3. Step 3: Cross multiply
   643,870x = 1,271,525 × 1,271,525
4. Step 4: Simplify right side
   643,870x = 1,616,775,825,625
5. Step 5: Solve for x
   x = 1,616,775,825,625/643,870
6. Step 6: Final answer
   x = 2,511,028.35