Finding the Fourth Proportional to 3,103.29, 4,654.89 and 1,128.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,103.29 : 4,654.89 = 1,128.91 : x
2. Step 2: Convert to fraction form
   3,103.29/4,654.89 = 1,128.91/x
3. Step 3: Cross multiply
   3,103.29x = 4,654.89 × 1,128.91
4. Step 4: Simplify right side
   3,103.29x = 5,254,965.23
5. Step 5: Solve for x
   x = 5,254,965.23/3,103.29
6. Step 6: Final answer
   x = 1,693.35