Finding the Third Proportional to 388,298 and 830,570

Step by Step Solution

1. Step 1: Write the proportion equation
   388,298 : 830,570 = 830,570 : x
2. Step 2: Convert to fraction form
   388,298/830,570 = 830,570/x
3. Step 3: Cross multiply
   388,298x = 830,570 × 830,570
4. Step 4: Simplify right side
   388,298x = 689,846,524,900
5. Step 5: Solve for x
   x = 689,846,524,900/388,298
6. Step 6: Final answer
   x = 1,776,590.47