Finding the Fourth Proportional to 3,128.91, 4,693.83 and 1,048.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.91 : 4,693.83 = 1,048.42 : x
2. Step 2: Convert to fraction form
   3,128.91/4,693.83 = 1,048.42/x
3. Step 3: Cross multiply
   3,128.91x = 4,693.83 × 1,048.42
4. Step 4: Simplify right side
   3,128.91x = 4,921,105.25
5. Step 5: Solve for x
   x = 4,921,105.25/3,128.91
6. Step 6: Final answer
   x = 1,572.79