Finding the Third Proportional to 1,662,190 and 3,639,663

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662,190 : 3,639,663 = 3,639,663 : x
2. Step 2: Convert to fraction form
   1,662,190/3,639,663 = 3,639,663/x
3. Step 3: Cross multiply
   1,662,190x = 3,639,663 × 3,639,663
4. Step 4: Simplify right side
   1,662,190x = 13,247,146,753,569
5. Step 5: Solve for x
   x = 13,247,146,753,569/1,662,190
6. Step 6: Final answer
   x = 7,969,694.65