Finding the Third Proportional to 3,968,402 and 8,613,316

Step by Step Solution

1. Step 1: Write the proportion equation
   3,968,402 : 8,613,316 = 8,613,316 : x
2. Step 2: Convert to fraction form
   3,968,402/8,613,316 = 8,613,316/x
3. Step 3: Cross multiply
   3,968,402x = 8,613,316 × 8,613,316
4. Step 4: Simplify right side
   3,968,402x = 74,189,212,515,856
5. Step 5: Solve for x
   x = 74,189,212,515,856/3,968,402
6. Step 6: Final answer
   x = 18,694,984.16