Finding the Third Proportional to 4,039,078 and 8,645,546

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,078 : 8,645,546 = 8,645,546 : x
2. Step 2: Convert to fraction form
   4,039,078/8,645,546 = 8,645,546/x
3. Step 3: Cross multiply
   4,039,078x = 8,645,546 × 8,645,546
4. Step 4: Simplify right side
   4,039,078x = 74,745,465,638,116
5. Step 5: Solve for x
   x = 74,745,465,638,116/4,039,078
6. Step 6: Final answer
   x = 18,505,576.18