Finding the Third Proportional to 12,782,055 and 17,978,814

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782,055 : 17,978,814 = 17,978,814 : x
2. Step 2: Convert to fraction form
   12,782,055/17,978,814 = 17,978,814/x
3. Step 3: Cross multiply
   12,782,055x = 17,978,814 × 17,978,814
4. Step 4: Simplify right side
   12,782,055x = 323,237,752,846,596
5. Step 5: Solve for x
   x = 323,237,752,846,596/12,782,055
6. Step 6: Final answer
   x = 25,288,402.60