Finding the Fourth Proportional to 3,426.60, 5,139.73 and 1,086.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.60 : 5,139.73 = 1,086.24 : x
2. Step 2: Convert to fraction form
   3,426.60/5,139.73 = 1,086.24/x
3. Step 3: Cross multiply
   3,426.60x = 5,139.73 × 1,086.24
4. Step 4: Simplify right side
   3,426.60x = 5,582,980.32
5. Step 5: Solve for x
   x = 5,582,980.32/3,426.60
6. Step 6: Final answer
   x = 1,629.31