Finding the Third Proportional to 3,943,800 and 8,485,392

Step by Step Solution

1. Step 1: Write the proportion equation
   3,943,800 : 8,485,392 = 8,485,392 : x
2. Step 2: Convert to fraction form
   3,943,800/8,485,392 = 8,485,392/x
3. Step 3: Cross multiply
   3,943,800x = 8,485,392 × 8,485,392
4. Step 4: Simplify right side
   3,943,800x = 72,001,877,393,664
5. Step 5: Solve for x
   x = 72,001,877,393,664/3,943,800
6. Step 6: Final answer
   x = 18,256,979.92