Finding the Third Proportional to 356,570 and 783,116

Step by Step Solution

1. Step 1: Write the proportion equation
   356,570 : 783,116 = 783,116 : x
2. Step 2: Convert to fraction form
   356,570/783,116 = 783,116/x
3. Step 3: Cross multiply
   356,570x = 783,116 × 783,116
4. Step 4: Simplify right side
   356,570x = 613,270,669,456
5. Step 5: Solve for x
   x = 613,270,669,456/356,570
6. Step 6: Final answer
   x = 1,719,916.62