Finding the Third Proportional to 3,921,145 and 8,493,610

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921,145 : 8,493,610 = 8,493,610 : x
2. Step 2: Convert to fraction form
   3,921,145/8,493,610 = 8,493,610/x
3. Step 3: Cross multiply
   3,921,145x = 8,493,610 × 8,493,610
4. Step 4: Simplify right side
   3,921,145x = 72,141,410,832,100
5. Step 5: Solve for x
   x = 72,141,410,832,100/3,921,145
6. Step 6: Final answer
   x = 18,398,047.21