Finding the Third Proportional to 3,964,230 and 8,656,542

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964,230 : 8,656,542 = 8,656,542 : x
2. Step 2: Convert to fraction form
   3,964,230/8,656,542 = 8,656,542/x
3. Step 3: Cross multiply
   3,964,230x = 8,656,542 × 8,656,542
4. Step 4: Simplify right side
   3,964,230x = 74,935,719,397,764
5. Step 5: Solve for x
   x = 74,935,719,397,764/3,964,230
6. Step 6: Final answer
   x = 18,902,969.66