Finding the Third Proportional to 3,931,247 and 8,409,005

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931,247 : 8,409,005 = 8,409,005 : x
2. Step 2: Convert to fraction form
   3,931,247/8,409,005 = 8,409,005/x
3. Step 3: Cross multiply
   3,931,247x = 8,409,005 × 8,409,005
4. Step 4: Simplify right side
   3,931,247x = 70,711,365,090,025
5. Step 5: Solve for x
   x = 70,711,365,090,025/3,931,247
6. Step 6: Final answer
   x = 17,987,006.44