Finding the Third Proportional to 359,929 and 787,648

Step by Step Solution

1. Step 1: Write the proportion equation
   359,929 : 787,648 = 787,648 : x
2. Step 2: Convert to fraction form
   359,929/787,648 = 787,648/x
3. Step 3: Cross multiply
   359,929x = 787,648 × 787,648
4. Step 4: Simplify right side
   359,929x = 620,389,371,904
5. Step 5: Solve for x
   x = 620,389,371,904/359,929
6. Step 6: Final answer
   x = 1,723,643.75