Finding the Third Proportional to 11,822,978 and 17,819,031

Step by Step Solution

1. Step 1: Write the proportion equation
   11,822,978 : 17,819,031 = 17,819,031 : x
2. Step 2: Convert to fraction form
   11,822,978/17,819,031 = 17,819,031/x
3. Step 3: Cross multiply
   11,822,978x = 17,819,031 × 17,819,031
4. Step 4: Simplify right side
   11,822,978x = 317,517,865,778,961
5. Step 5: Solve for x
   x = 317,517,865,778,961/11,822,978
6. Step 6: Final answer
   x = 26,855,997.35