Finding the Fourth Proportional to 2,124.96, 3,189.20 and 1,085.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.96 : 3,189.20 = 1,085.73 : x
2. Step 2: Convert to fraction form
   2,124.96/3,189.20 = 1,085.73/x
3. Step 3: Cross multiply
   2,124.96x = 3,189.20 × 1,085.73
4. Step 4: Simplify right side
   2,124.96x = 3,462,610.12
5. Step 5: Solve for x
   x = 3,462,610.12/2,124.96
6. Step 6: Final answer
   x = 1,629.49