Finding the Third Proportional to 3,955,804 and 8,121,317

Step by Step Solution

1. Step 1: Write the proportion equation
   3,955,804 : 8,121,317 = 8,121,317 : x
2. Step 2: Convert to fraction form
   3,955,804/8,121,317 = 8,121,317/x
3. Step 3: Cross multiply
   3,955,804x = 8,121,317 × 8,121,317
4. Step 4: Simplify right side
   3,955,804x = 65,955,789,814,489
5. Step 5: Solve for x
   x = 65,955,789,814,489/3,955,804
6. Step 6: Final answer
   x = 16,673,169.30