Finding the Fourth Proportional to 2,085.12, 3,126.24 and 1,111.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.12 : 3,126.24 = 1,111.95 : x
2. Step 2: Convert to fraction form
   2,085.12/3,126.24 = 1,111.95/x
3. Step 3: Cross multiply
   2,085.12x = 3,126.24 × 1,111.95
4. Step 4: Simplify right side
   2,085.12x = 3,476,222.57
5. Step 5: Solve for x
   x = 3,476,222.57/2,085.12
6. Step 6: Final answer
   x = 1,667.16