Finding the Third Proportional to 815,636 and 1,919,258

Step by Step Solution

1. Step 1: Write the proportion equation
   815,636 : 1,919,258 = 1,919,258 : x
2. Step 2: Convert to fraction form
   815,636/1,919,258 = 1,919,258/x
3. Step 3: Cross multiply
   815,636x = 1,919,258 × 1,919,258
4. Step 4: Simplify right side
   815,636x = 3,683,551,270,564
5. Step 5: Solve for x
   x = 3,683,551,270,564/815,636
6. Step 6: Final answer
   x = 4,516,170.54