Finding the Third Proportional to 3,939,534 and 8,467,578

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,534 : 8,467,578 = 8,467,578 : x
2. Step 2: Convert to fraction form
   3,939,534/8,467,578 = 8,467,578/x
3. Step 3: Cross multiply
   3,939,534x = 8,467,578 × 8,467,578
4. Step 4: Simplify right side
   3,939,534x = 71,699,877,186,084
5. Step 5: Solve for x
   x = 71,699,877,186,084/3,939,534
6. Step 6: Final answer
   x = 18,200,090.97