Finding the Third Proportional to 1,863,666 and 3,992,940

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863,666 : 3,992,940 = 3,992,940 : x
2. Step 2: Convert to fraction form
   1,863,666/3,992,940 = 3,992,940/x
3. Step 3: Cross multiply
   1,863,666x = 3,992,940 × 3,992,940
4. Step 4: Simplify right side
   1,863,666x = 15,943,569,843,600
5. Step 5: Solve for x
   x = 15,943,569,843,600/1,863,666
6. Step 6: Final answer
   x = 8,554,950.21