Finding the Third Proportional to 3,123,721 and 4,718,866

Step by Step Solution

1. Step 1: Write the proportion equation
   3,123,721 : 4,718,866 = 4,718,866 : x
2. Step 2: Convert to fraction form
   3,123,721/4,718,866 = 4,718,866/x
3. Step 3: Cross multiply
   3,123,721x = 4,718,866 × 4,718,866
4. Step 4: Simplify right side
   3,123,721x = 22,267,696,325,956
5. Step 5: Solve for x
   x = 22,267,696,325,956/3,123,721
6. Step 6: Final answer
   x = 7,128,580.41