Finding the Fourth Proportional to 3,429.73, 5,143.56 and 1,089.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,429.73 : 5,143.56 = 1,089.64 : x
2. Step 2: Convert to fraction form
   3,429.73/5,143.56 = 1,089.64/x
3. Step 3: Cross multiply
   3,429.73x = 5,143.56 × 1,089.64
4. Step 4: Simplify right side
   3,429.73x = 5,604,628.72
5. Step 5: Solve for x
   x = 5,604,628.72/3,429.73
6. Step 6: Final answer
   x = 1,634.13