Finding the Fourth Proportional to 2,960.76, 4,441.57 and 985.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,960.76 : 4,441.57 = 985.72 : x
2. Step 2: Convert to fraction form
   2,960.76/4,441.57 = 985.72/x
3. Step 3: Cross multiply
   2,960.76x = 4,441.57 × 985.72
4. Step 4: Simplify right side
   2,960.76x = 4,378,144.38
5. Step 5: Solve for x
   x = 4,378,144.38/2,960.76
6. Step 6: Final answer
   x = 1,478.72