Finding the Fourth Proportional to 3,128.46, 4,689.93 and 1,179.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.46 : 4,689.93 = 1,179.30 : x
2. Step 2: Convert to fraction form
   3,128.46/4,689.93 = 1,179.30/x
3. Step 3: Cross multiply
   3,128.46x = 4,689.93 × 1,179.30
4. Step 4: Simplify right side
   3,128.46x = 5,530,834.45
5. Step 5: Solve for x
   x = 5,530,834.45/3,128.46
6. Step 6: Final answer
   x = 1,767.91