Finding the Fourth Proportional to 2,124.70, 3,189.04 and 1,085.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.70 : 3,189.04 = 1,085.42 : x
2. Step 2: Convert to fraction form
   2,124.70/3,189.04 = 1,085.42/x
3. Step 3: Cross multiply
   2,124.70x = 3,189.04 × 1,085.42
4. Step 4: Simplify right side
   2,124.70x = 3,461,447.80
5. Step 5: Solve for x
   x = 3,461,447.80/2,124.70
6. Step 6: Final answer
   x = 1,629.15