Finding the Third Proportional to 3,556,620 and 8,391,936

Step by Step Solution

1. Step 1: Write the proportion equation
   3,556,620 : 8,391,936 = 8,391,936 : x
2. Step 2: Convert to fraction form
   3,556,620/8,391,936 = 8,391,936/x
3. Step 3: Cross multiply
   3,556,620x = 8,391,936 × 8,391,936
4. Step 4: Simplify right side
   3,556,620x = 70,424,589,828,096
5. Step 5: Solve for x
   x = 70,424,589,828,096/3,556,620
6. Step 6: Final answer
   x = 19,800,987.97