Finding the Third Proportional to 687,378 and 1,625,238

Step by Step Solution

1. Step 1: Write the proportion equation
   687,378 : 1,625,238 = 1,625,238 : x
2. Step 2: Convert to fraction form
   687,378/1,625,238 = 1,625,238/x
3. Step 3: Cross multiply
   687,378x = 1,625,238 × 1,625,238
4. Step 4: Simplify right side
   687,378x = 2,641,398,556,644
5. Step 5: Solve for x
   x = 2,641,398,556,644/687,378
6. Step 6: Final answer
   x = 3,842,716.17