Finding the Third Proportional to 359,320 and 782,388

Step by Step Solution

1. Step 1: Write the proportion equation
   359,320 : 782,388 = 782,388 : x
2. Step 2: Convert to fraction form
   359,320/782,388 = 782,388/x
3. Step 3: Cross multiply
   359,320x = 782,388 × 782,388
4. Step 4: Simplify right side
   359,320x = 612,130,982,544
5. Step 5: Solve for x
   x = 612,130,982,544/359,320
6. Step 6: Final answer
   x = 1,703,581.72