Finding the Third Proportional to 3,890,385 and 8,453,542

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890,385 : 8,453,542 = 8,453,542 : x
2. Step 2: Convert to fraction form
   3,890,385/8,453,542 = 8,453,542/x
3. Step 3: Cross multiply
   3,890,385x = 8,453,542 × 8,453,542
4. Step 4: Simplify right side
   3,890,385x = 71,462,372,345,764
5. Step 5: Solve for x
   x = 71,462,372,345,764/3,890,385
6. Step 6: Final answer
   x = 18,368,971.80