Finding the Fourth Proportional to 2,085.38, 3,129.49 and 1,112.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.38 : 3,129.49 = 1,112.16 : x
2. Step 2: Convert to fraction form
   2,085.38/3,129.49 = 1,112.16/x
3. Step 3: Cross multiply
   2,085.38x = 3,129.49 × 1,112.16
4. Step 4: Simplify right side
   2,085.38x = 3,480,488.04
5. Step 5: Solve for x
   x = 3,480,488.04/2,085.38
6. Step 6: Final answer
   x = 1,669.00