Finding the Fourth Proportional to 3,426.48, 5,140.49 and 1,086.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.48 : 5,140.49 = 1,086.62 : x
2. Step 2: Convert to fraction form
   3,426.48/5,140.49 = 1,086.62/x
3. Step 3: Cross multiply
   3,426.48x = 5,140.49 × 1,086.62
4. Step 4: Simplify right side
   3,426.48x = 5,585,759.24
5. Step 5: Solve for x
   x = 5,585,759.24/3,426.48
6. Step 6: Final answer
   x = 1,630.17