Finding the Third Proportional to 30,620.91 and 65,615.81

Step by Step Solution

1. Step 1: Write the proportion equation
   30,620.91 : 65,615.81 = 65,615.81 : x
2. Step 2: Convert to fraction form
   30,620.91/65,615.81 = 65,615.81/x
3. Step 3: Cross multiply
   30,620.91x = 65,615.81 × 65,615.81
4. Step 4: Simplify right side
   30,620.91x = 4,305,434,850.04
5. Step 5: Solve for x
   x = 4,305,434,850.04/30,620.91
6. Step 6: Final answer
   x = 140,604.42