Finding the Third Proportional to 728,084 and 1,139,660

Step by Step Solution

1. Step 1: Write the proportion equation
   728,084 : 1,139,660 = 1,139,660 : x
2. Step 2: Convert to fraction form
   728,084/1,139,660 = 1,139,660/x
3. Step 3: Cross multiply
   728,084x = 1,139,660 × 1,139,660
4. Step 4: Simplify right side
   728,084x = 1,298,824,915,600
5. Step 5: Solve for x
   x = 1,298,824,915,600/728,084
6. Step 6: Final answer
   x = 1,783,894.32