Finding the Fourth Proportional to 2,085.59, 2,878.07 and 1,154.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.59 : 2,878.07 = 1,154.09 : x
2. Step 2: Convert to fraction form
   2,085.59/2,878.07 = 1,154.09/x
3. Step 3: Cross multiply
   2,085.59x = 2,878.07 × 1,154.09
4. Step 4: Simplify right side
   2,085.59x = 3,321,540.30
5. Step 5: Solve for x
   x = 3,321,540.30/2,085.59
6. Step 6: Final answer
   x = 1,592.62