Finding the Fourth Proportional to 2,085.11, 2,877.42 and 1,153.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.11 : 2,877.42 = 1,153.61 : x
2. Step 2: Convert to fraction form
   2,085.11/2,877.42 = 1,153.61/x
3. Step 3: Cross multiply
   2,085.11x = 2,877.42 × 1,153.61
4. Step 4: Simplify right side
   2,085.11x = 3,319,406.10
5. Step 5: Solve for x
   x = 3,319,406.10/2,085.11
6. Step 6: Final answer
   x = 1,591.96