Finding the Third Proportional to 687,414 and 1,510,238

Step by Step Solution

1. Step 1: Write the proportion equation
   687,414 : 1,510,238 = 1,510,238 : x
2. Step 2: Convert to fraction form
   687,414/1,510,238 = 1,510,238/x
3. Step 3: Cross multiply
   687,414x = 1,510,238 × 1,510,238
4. Step 4: Simplify right side
   687,414x = 2,280,818,816,644
5. Step 5: Solve for x
   x = 2,280,818,816,644/687,414
6. Step 6: Final answer
   x = 3,317,969.69