Finding the Fourth Proportional to 2,085.86, 2,878.88 and 1,340.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.86 : 2,878.88 = 1,340.75 : x
2. Step 2: Convert to fraction form
   2,085.86/2,878.88 = 1,340.75/x
3. Step 3: Cross multiply
   2,085.86x = 2,878.88 × 1,340.75
4. Step 4: Simplify right side
   2,085.86x = 3,859,858.85
5. Step 5: Solve for x
   x = 3,859,858.85/2,085.86
6. Step 6: Final answer
   x = 1,850.49