Finding the Fourth Proportional to 3,431.72, 5,147.88 and 966.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,431.72 : 5,147.88 = 966.56 : x
2. Step 2: Convert to fraction form
   3,431.72/5,147.88 = 966.56/x
3. Step 3: Cross multiply
   3,431.72x = 5,147.88 × 966.56
4. Step 4: Simplify right side
   3,431.72x = 4,975,734.89
5. Step 5: Solve for x
   x = 4,975,734.89/3,431.72
6. Step 6: Final answer
   x = 1,449.92