Finding the Third Proportional to 3,645,578 and 7,977,380

Step by Step Solution

1. Step 1: Write the proportion equation
   3,645,578 : 7,977,380 = 7,977,380 : x
2. Step 2: Convert to fraction form
   3,645,578/7,977,380 = 7,977,380/x
3. Step 3: Cross multiply
   3,645,578x = 7,977,380 × 7,977,380
4. Step 4: Simplify right side
   3,645,578x = 63,638,591,664,400
5. Step 5: Solve for x
   x = 63,638,591,664,400/3,645,578
6. Step 6: Final answer
   x = 17,456,379.12