Finding the Third Proportional to 385,679 and 790,150

Step by Step Solution

1. Step 1: Write the proportion equation
   385,679 : 790,150 = 790,150 : x
2. Step 2: Convert to fraction form
   385,679/790,150 = 790,150/x
3. Step 3: Cross multiply
   385,679x = 790,150 × 790,150
4. Step 4: Simplify right side
   385,679x = 624,337,022,500
5. Step 5: Solve for x
   x = 624,337,022,500/385,679
6. Step 6: Final answer
   x = 1,618,799.63