Finding the Third Proportional to 4,089,136 and 8,702,816

Step by Step Solution

1. Step 1: Write the proportion equation
   4,089,136 : 8,702,816 = 8,702,816 : x
2. Step 2: Convert to fraction form
   4,089,136/8,702,816 = 8,702,816/x
3. Step 3: Cross multiply
   4,089,136x = 8,702,816 × 8,702,816
4. Step 4: Simplify right side
   4,089,136x = 75,739,006,329,856
5. Step 5: Solve for x
   x = 75,739,006,329,856/4,089,136
6. Step 6: Final answer
   x = 18,522,007.17