Finding the Fourth Proportional to 3,128.56, 4,691.34 and 1,179.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.56 : 4,691.34 = 1,179.52 : x
2. Step 2: Convert to fraction form
   3,128.56/4,691.34 = 1,179.52/x
3. Step 3: Cross multiply
   3,128.56x = 4,691.34 × 1,179.52
4. Step 4: Simplify right side
   3,128.56x = 5,533,529.36
5. Step 5: Solve for x
   x = 5,533,529.36/3,128.56
6. Step 6: Final answer
   x = 1,768.71