Finding the Third Proportional to 687,409 and 1,510,229

Step by Step Solution

1. Step 1: Write the proportion equation
   687,409 : 1,510,229 = 1,510,229 : x
2. Step 2: Convert to fraction form
   687,409/1,510,229 = 1,510,229/x
3. Step 3: Cross multiply
   687,409x = 1,510,229 × 1,510,229
4. Step 4: Simplify right side
   687,409x = 2,280,791,632,441
5. Step 5: Solve for x
   x = 2,280,791,632,441/687,409
6. Step 6: Final answer
   x = 3,317,954.28