Finding the Fourth Proportional to 3,071.28, 4,608.72 and 1,123.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,071.28 : 4,608.72 = 1,123.62 : x
2. Step 2: Convert to fraction form
   3,071.28/4,608.72 = 1,123.62/x
3. Step 3: Cross multiply
   3,071.28x = 4,608.72 × 1,123.62
4. Step 4: Simplify right side
   3,071.28x = 5,178,449.97
5. Step 5: Solve for x
   x = 5,178,449.97/3,071.28
6. Step 6: Final answer
   x = 1,686.09