Finding the Fourth Proportional to 2,721.85, 4,081.86 and 966.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,721.85 : 4,081.86 = 966.78 : x
2. Step 2: Convert to fraction form
   2,721.85/4,081.86 = 966.78/x
3. Step 3: Cross multiply
   2,721.85x = 4,081.86 × 966.78
4. Step 4: Simplify right side
   2,721.85x = 3,946,260.61
5. Step 5: Solve for x
   x = 3,946,260.61/2,721.85
6. Step 6: Final answer
   x = 1,449.85