Finding the Fourth Proportional to 2,085.25, 3,129.30 and 1,112.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.25 : 3,129.30 = 1,112.04 : x
2. Step 2: Convert to fraction form
   2,085.25/3,129.30 = 1,112.04/x
3. Step 3: Cross multiply
   2,085.25x = 3,129.30 × 1,112.04
4. Step 4: Simplify right side
   2,085.25x = 3,479,885.57
5. Step 5: Solve for x
   x = 3,479,885.57/2,085.25
6. Step 6: Final answer
   x = 1,668.81