Finding the Third Proportional to 16,660.69 and 35,986.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,660.69 : 35,986.78 = 35,986.78 : x
2. Step 2: Convert to fraction form
   16,660.69/35,986.78 = 35,986.78/x
3. Step 3: Cross multiply
   16,660.69x = 35,986.78 × 35,986.78
4. Step 4: Simplify right side
   16,660.69x = 1,295,048,424.74
5. Step 5: Solve for x
   x = 1,295,048,424.74/16,660.69
6. Step 6: Final answer
   x = 77,730.79