Finding the Fourth Proportional to 3,076.63, 4,612.18 and 1,128.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,076.63 : 4,612.18 = 1,128.38 : x
2. Step 2: Convert to fraction form
   3,076.63/4,612.18 = 1,128.38/x
3. Step 3: Cross multiply
   3,076.63x = 4,612.18 × 1,128.38
4. Step 4: Simplify right side
   3,076.63x = 5,204,291.67
5. Step 5: Solve for x
   x = 5,204,291.67/3,076.63
6. Step 6: Final answer
   x = 1,691.56