Finding the Third Proportional to 787,680 and 1,728,540

Step by Step Solution

1. Step 1: Write the proportion equation
   787,680 : 1,728,540 = 1,728,540 : x
2. Step 2: Convert to fraction form
   787,680/1,728,540 = 1,728,540/x
3. Step 3: Cross multiply
   787,680x = 1,728,540 × 1,728,540
4. Step 4: Simplify right side
   787,680x = 2,987,850,531,600
5. Step 5: Solve for x
   x = 2,987,850,531,600/787,680
6. Step 6: Final answer
   x = 3,793,228.89