Finding the Fourth Proportional to 2,085.96, 3,130.83 and 1,112.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.96 : 3,130.83 = 1,112.88 : x
2. Step 2: Convert to fraction form
   2,085.96/3,130.83 = 1,112.88/x
3. Step 3: Cross multiply
   2,085.96x = 3,130.83 × 1,112.88
4. Step 4: Simplify right side
   2,085.96x = 3,484,238.09
5. Step 5: Solve for x
   x = 3,484,238.09/2,085.96
6. Step 6: Final answer
   x = 1,670.33