Finding the Third Proportional to 12,778 and 30,918

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778 : 30,918 = 30,918 : x
2. Step 2: Convert to fraction form
   12,778/30,918 = 30,918/x
3. Step 3: Cross multiply
   12,778x = 30,918 × 30,918
4. Step 4: Simplify right side
   12,778x = 955,922,724
5. Step 5: Solve for x
   x = 955,922,724/12,778
6. Step 6: Final answer
   x = 74,810.04