Finding the Third Proportional to 685,351.50 and 1,485,111

Step by Step Solution

1. Step 1: Write the proportion equation
   685,351.50 : 1,485,111 = 1,485,111 : x
2. Step 2: Convert to fraction form
   685,351.50/1,485,111 = 1,485,111/x
3. Step 3: Cross multiply
   685,351.50x = 1,485,111 × 1,485,111
4. Step 4: Simplify right side
   685,351.50x = 2,205,554,682,321
5. Step 5: Solve for x
   x = 2,205,554,682,321/685,351.50
6. Step 6: Final answer
   x = 3,218,136.51