Finding the Fourth Proportional to 3,086.72, 4,629.76 and 1,138.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.72 : 4,629.76 = 1,138.24 : x
2. Step 2: Convert to fraction form
   3,086.72/4,629.76 = 1,138.24/x
3. Step 3: Cross multiply
   3,086.72x = 4,629.76 × 1,138.24
4. Step 4: Simplify right side
   3,086.72x = 5,269,778.02
5. Step 5: Solve for x
   x = 5,269,778.02/3,086.72
6. Step 6: Final answer
   x = 1,707.24