Finding the Fourth Proportional to 2,085.12, 3,126.87 and 1,110.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.12 : 3,126.87 = 1,110.69 : x
2. Step 2: Convert to fraction form
   2,085.12/3,126.87 = 1,110.69/x
3. Step 3: Cross multiply
   2,085.12x = 3,126.87 × 1,110.69
4. Step 4: Simplify right side
   2,085.12x = 3,472,983.24
5. Step 5: Solve for x
   x = 3,472,983.24/2,085.12
6. Step 6: Final answer
   x = 1,665.60