Finding the Third Proportional to 12,772.69 and 30,906.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,772.69 : 30,906.56 = 30,906.56 : x
2. Step 2: Convert to fraction form
   12,772.69/30,906.56 = 30,906.56/x
3. Step 3: Cross multiply
   12,772.69x = 30,906.56 × 30,906.56
4. Step 4: Simplify right side
   12,772.69x = 955,215,605.57
5. Step 5: Solve for x
   x = 955,215,605.57/12,772.69
6. Step 6: Final answer
   x = 74,785.80