Finding the Fourth Proportional to 3,076.25, 4,616.22 and 1,128.65

Step by Step Solution

1. Step 1: Write the proportion equation
   3,076.25 : 4,616.22 = 1,128.65 : x
2. Step 2: Convert to fraction form
   3,076.25/4,616.22 = 1,128.65/x
3. Step 3: Cross multiply
   3,076.25x = 4,616.22 × 1,128.65
4. Step 4: Simplify right side
   3,076.25x = 5,210,096.70
5. Step 5: Solve for x
   x = 5,210,096.70/3,076.25
6. Step 6: Final answer
   x = 1,693.65