Finding the Third Proportional to 4,118,599 and 8,578,087

Step by Step Solution

1. Step 1: Write the proportion equation
   4,118,599 : 8,578,087 = 8,578,087 : x
2. Step 2: Convert to fraction form
   4,118,599/8,578,087 = 8,578,087/x
3. Step 3: Cross multiply
   4,118,599x = 8,578,087 × 8,578,087
4. Step 4: Simplify right side
   4,118,599x = 73,583,576,579,569
5. Step 5: Solve for x
   x = 73,583,576,579,569/4,118,599
6. Step 6: Final answer
   x = 17,866,166.77