Finding the Third Proportional to 12,782,100 and 17,978,874

Step by Step Solution

1. Step 1: Write the proportion equation
   12,782,100 : 17,978,874 = 17,978,874 : x
2. Step 2: Convert to fraction form
   12,782,100/17,978,874 = 17,978,874/x
3. Step 3: Cross multiply
   12,782,100x = 17,978,874 × 17,978,874
4. Step 4: Simplify right side
   12,782,100x = 323,239,910,307,876
5. Step 5: Solve for x
   x = 323,239,910,307,876/12,782,100
6. Step 6: Final answer
   x = 25,288,482.35