Finding the Third Proportional to 3,943,728 and 8,485,236

Step by Step Solution

1. Step 1: Write the proportion equation
   3,943,728 : 8,485,236 = 8,485,236 : x
2. Step 2: Convert to fraction form
   3,943,728/8,485,236 = 8,485,236/x
3. Step 3: Cross multiply
   3,943,728x = 8,485,236 × 8,485,236
4. Step 4: Simplify right side
   3,943,728x = 71,999,229,975,696
5. Step 5: Solve for x
   x = 71,999,229,975,696/3,943,728
6. Step 6: Final answer
   x = 18,256,641.93