Finding the Fourth Proportional to 2,085.66, 3,129.03 and 1,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.66 : 3,129.03 = 1,111.50 : x
2. Step 2: Convert to fraction form
   2,085.66/3,129.03 = 1,111.50/x
3. Step 3: Cross multiply
   2,085.66x = 3,129.03 × 1,111.50
4. Step 4: Simplify right side
   2,085.66x = 3,477,916.85
5. Step 5: Solve for x
   x = 3,477,916.85/2,085.66
6. Step 6: Final answer
   x = 1,667.54