Finding the Fourth Proportional to 2,007.72, 3,009.56 and 966.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.72 : 3,009.56 = 966.20 : x
2. Step 2: Convert to fraction form
   2,007.72/3,009.56 = 966.20/x
3. Step 3: Cross multiply
   2,007.72x = 3,009.56 × 966.20
4. Step 4: Simplify right side
   2,007.72x = 2,907,836.87
5. Step 5: Solve for x
   x = 2,907,836.87/2,007.72
6. Step 6: Final answer
   x = 1,448.33