Finding the Third Proportional to 665,400 and 1,042,456.50

Step by Step Solution

1. Step 1: Write the proportion equation
   665,400 : 1,042,456.50 = 1,042,456.50 : x
2. Step 2: Convert to fraction form
   665,400/1,042,456.50 = 1,042,456.50/x
3. Step 3: Cross multiply
   665,400x = 1,042,456.50 × 1,042,456.50
4. Step 4: Simplify right side
   665,400x = 1,086,715,554,392.25
5. Step 5: Solve for x
   x = 1,086,715,554,392.25/665,400
6. Step 6: Final answer
   x = 1,633,176.37