Finding the Fourth Proportional to 3,086.53, 4,628.55 and 1,138.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.53 : 4,628.55 = 1,138.30 : x
2. Step 2: Convert to fraction form
   3,086.53/4,628.55 = 1,138.30/x
3. Step 3: Cross multiply
   3,086.53x = 4,628.55 × 1,138.30
4. Step 4: Simplify right side
   3,086.53x = 5,268,678.47
5. Step 5: Solve for x
   x = 5,268,678.47/3,086.53
6. Step 6: Final answer
   x = 1,706.99