Finding the Fourth Proportional to 5,086.27, 7,629.30 and 1,388.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,086.27 : 7,629.30 = 1,388.82 : x
2. Step 2: Convert to fraction form
   5,086.27/7,629.30 = 1,388.82/x
3. Step 3: Cross multiply
   5,086.27x = 7,629.30 × 1,388.82
4. Step 4: Simplify right side
   5,086.27x = 10,595,724.43
5. Step 5: Solve for x
   x = 10,595,724.43/5,086.27
6. Step 6: Final answer
   x = 2,083.20