Finding the Third Proportional to 3,643,638 and 5,445,378

Step by Step Solution

1. Step 1: Write the proportion equation
   3,643,638 : 5,445,378 = 5,445,378 : x
2. Step 2: Convert to fraction form
   3,643,638/5,445,378 = 5,445,378/x
3. Step 3: Cross multiply
   3,643,638x = 5,445,378 × 5,445,378
4. Step 4: Simplify right side
   3,643,638x = 29,652,141,562,884
5. Step 5: Solve for x
   x = 29,652,141,562,884/3,643,638
6. Step 6: Final answer
   x = 8,138,059.15