Finding the Third Proportional to 3,885,144 and 8,243,688

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885,144 : 8,243,688 = 8,243,688 : x
2. Step 2: Convert to fraction form
   3,885,144/8,243,688 = 8,243,688/x
3. Step 3: Cross multiply
   3,885,144x = 8,243,688 × 8,243,688
4. Step 4: Simplify right side
   3,885,144x = 67,958,391,841,344
5. Step 5: Solve for x
   x = 67,958,391,841,344/3,885,144
6. Step 6: Final answer
   x = 17,491,859.21