Finding the Fourth Proportional to 5,139.91, 7,086.02 and 3,250.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.91 : 7,086.02 = 3,250.55 : x
2. Step 2: Convert to fraction form
   5,139.91/7,086.02 = 3,250.55/x
3. Step 3: Cross multiply
   5,139.91x = 7,086.02 × 3,250.55
4. Step 4: Simplify right side
   5,139.91x = 23,033,462.31
5. Step 5: Solve for x
   x = 23,033,462.31/5,139.91
6. Step 6: Final answer
   x = 4,481.30