Finding the Third Proportional to 390,484 and 791,834

Step by Step Solution

1. Step 1: Write the proportion equation
   390,484 : 791,834 = 791,834 : x
2. Step 2: Convert to fraction form
   390,484/791,834 = 791,834/x
3. Step 3: Cross multiply
   390,484x = 791,834 × 791,834
4. Step 4: Simplify right side
   390,484x = 627,001,083,556
5. Step 5: Solve for x
   x = 627,001,083,556/390,484
6. Step 6: Final answer
   x = 1,605,702.37