Finding the Third Proportional to 12,689,310 and 18,089,181

Step by Step Solution

1. Step 1: Write the proportion equation
   12,689,310 : 18,089,181 = 18,089,181 : x
2. Step 2: Convert to fraction form
   12,689,310/18,089,181 = 18,089,181/x
3. Step 3: Cross multiply
   12,689,310x = 18,089,181 × 18,089,181
4. Step 4: Simplify right side
   12,689,310x = 327,218,469,250,761
5. Step 5: Solve for x
   x = 327,218,469,250,761/12,689,310
6. Step 6: Final answer
   x = 25,786,939.50