Finding the Fourth Proportional to 5,182.56, 7,151.40 and 3,086.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,182.56 : 7,151.40 = 3,086.28 : x
2. Step 2: Convert to fraction form
   5,182.56/7,151.40 = 3,086.28/x
3. Step 3: Cross multiply
   5,182.56x = 7,151.40 × 3,086.28
4. Step 4: Simplify right side
   5,182.56x = 22,071,222.79
5. Step 5: Solve for x
   x = 22,071,222.79/5,182.56
6. Step 6: Final answer
   x = 4,258.75