Finding the Fourth Proportional to 3,086.61, 4,630.81 and 1,112.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.61 : 4,630.81 = 1,112.20 : x
2. Step 2: Convert to fraction form
   3,086.61/4,630.81 = 1,112.20/x
3. Step 3: Cross multiply
   3,086.61x = 4,630.81 × 1,112.20
4. Step 4: Simplify right side
   3,086.61x = 5,150,396.15
5. Step 5: Solve for x
   x = 5,150,396.15/3,086.61
6. Step 6: Final answer
   x = 1,668.63