Finding the Third Proportional to 12,782,049 and 17,978,805

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782,049 : 17,978,805 = 17,978,805 : x
2. Step 2: Convert to fraction form
   12,782,049/17,978,805 = 17,978,805/x
3. Step 3: Cross multiply
   12,782,049x = 17,978,805 × 17,978,805
4. Step 4: Simplify right side
   12,782,049x = 323,237,429,228,025
5. Step 5: Solve for x
   x = 323,237,429,228,025/12,782,049
6. Step 6: Final answer
   x = 25,288,389.15