Finding the Third Proportional to 388,520 and 845,404

Step by Step Solution

1. Step 1: Write the proportion equation
   388,520 : 845,404 = 845,404 : x
2. Step 2: Convert to fraction form
   388,520/845,404 = 845,404/x
3. Step 3: Cross multiply
   388,520x = 845,404 × 845,404
4. Step 4: Simplify right side
   388,520x = 714,707,923,216
5. Step 5: Solve for x
   x = 714,707,923,216/388,520
6. Step 6: Final answer
   x = 1,839,565.33