Finding the Third Proportional to 3,945,404 and 8,490,046

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945,404 : 8,490,046 = 8,490,046 : x
2. Step 2: Convert to fraction form
   3,945,404/8,490,046 = 8,490,046/x
3. Step 3: Cross multiply
   3,945,404x = 8,490,046 × 8,490,046
4. Step 4: Simplify right side
   3,945,404x = 72,080,881,082,116
5. Step 5: Solve for x
   x = 72,080,881,082,116/3,945,404
6. Step 6: Final answer
   x = 18,269,581.79