Finding the Third Proportional to 3,968,420 and 8,613,352

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968,420 : 8,613,352 = 8,613,352 : x
2. Step 2: Convert to fraction form
   3,968,420/8,613,352 = 8,613,352/x
3. Step 3: Cross multiply
   3,968,420x = 8,613,352 × 8,613,352
4. Step 4: Simplify right side
   3,968,420x = 74,189,832,675,904
5. Step 5: Solve for x
   x = 74,189,832,675,904/3,968,420
6. Step 6: Final answer
   x = 18,695,055.63