Finding the Third Proportional to 3,899,529 and 8,415,606

Step by Step Solution

1. Step 1: Write the proportion equation
   3,899,529 : 8,415,606 = 8,415,606 : x
2. Step 2: Convert to fraction form
   3,899,529/8,415,606 = 8,415,606/x
3. Step 3: Cross multiply
   3,899,529x = 8,415,606 × 8,415,606
4. Step 4: Simplify right side
   3,899,529x = 70,822,424,347,236
5. Step 5: Solve for x
   x = 70,822,424,347,236/3,899,529
6. Step 6: Final answer
   x = 18,161,789.37