Finding the Fourth Proportional to 3,103.95, 4,654.17 and 1,128.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,103.95 : 4,654.17 = 1,128.90 : x
2. Step 2: Convert to fraction form
   3,103.95/4,654.17 = 1,128.90/x
3. Step 3: Cross multiply
   3,103.95x = 4,654.17 × 1,128.90
4. Step 4: Simplify right side
   3,103.95x = 5,254,092.51
5. Step 5: Solve for x
   x = 5,254,092.51/3,103.95
6. Step 6: Final answer
   x = 1,692.71