Finding the Fourth Proportional to 2,711.12, 4,065.72 and 1,171.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,711.12 : 4,065.72 = 1,171.28 : x
2. Step 2: Convert to fraction form
   2,711.12/4,065.72 = 1,171.28/x
3. Step 3: Cross multiply
   2,711.12x = 4,065.72 × 1,171.28
4. Step 4: Simplify right side
   2,711.12x = 4,762,096.52
5. Step 5: Solve for x
   x = 4,762,096.52/2,711.12
6. Step 6: Final answer
   x = 1,756.51