Finding the Third Proportional to 30,770.72 and 66,249.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,770.72 : 66,249.56 = 66,249.56 : x
2. Step 2: Convert to fraction form
   30,770.72/66,249.56 = 66,249.56/x
3. Step 3: Cross multiply
   30,770.72x = 66,249.56 × 66,249.56
4. Step 4: Simplify right side
   30,770.72x = 4,389,004,531.44
5. Step 5: Solve for x
   x = 4,389,004,531.44/30,770.72
6. Step 6: Final answer
   x = 142,635.75