Finding the Fourth Proportional to 2,085.57, 2,878.07 and 1,154.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.57 : 2,878.07 = 1,154.07 : x
2. Step 2: Convert to fraction form
   2,085.57/2,878.07 = 1,154.07/x
3. Step 3: Cross multiply
   2,085.57x = 2,878.07 × 1,154.07
4. Step 4: Simplify right side
   2,085.57x = 3,321,488.47
5. Step 5: Solve for x
   x = 3,321,488.47/2,085.57
6. Step 6: Final answer
   x = 1,592.60