Finding the Third Proportional to 3,939,700 and 8,487,296

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,700 : 8,487,296 = 8,487,296 : x
2. Step 2: Convert to fraction form
   3,939,700/8,487,296 = 8,487,296/x
3. Step 3: Cross multiply
   3,939,700x = 8,487,296 × 8,487,296
4. Step 4: Simplify right side
   3,939,700x = 72,034,193,391,616
5. Step 5: Solve for x
   x = 72,034,193,391,616/3,939,700
6. Step 6: Final answer
   x = 18,284,182.40