Finding the Third Proportional to 648,866 and 867,945

Step by Step Solution

1. Step 1: Write the proportion equation
   648,866 : 867,945 = 867,945 : x
2. Step 2: Convert to fraction form
   648,866/867,945 = 867,945/x
3. Step 3: Cross multiply
   648,866x = 867,945 × 867,945
4. Step 4: Simplify right side
   648,866x = 753,328,523,025
5. Step 5: Solve for x
   x = 753,328,523,025/648,866
6. Step 6: Final answer
   x = 1,160,992.44