Finding the Third Proportional to 3,664,380 and 7,815,660

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664,380 : 7,815,660 = 7,815,660 : x
2. Step 2: Convert to fraction form
   3,664,380/7,815,660 = 7,815,660/x
3. Step 3: Cross multiply
   3,664,380x = 7,815,660 × 7,815,660
4. Step 4: Simplify right side
   3,664,380x = 61,084,541,235,600
5. Step 5: Solve for x
   x = 61,084,541,235,600/3,664,380
6. Step 6: Final answer
   x = 16,669,816.24