Finding the Fourth Proportional to 2,081.73, 2,876.88 and 1,860.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.73 : 2,876.88 = 1,860.30 : x
2. Step 2: Convert to fraction form
   2,081.73/2,876.88 = 1,860.30/x
3. Step 3: Cross multiply
   2,081.73x = 2,876.88 × 1,860.30
4. Step 4: Simplify right side
   2,081.73x = 5,351,859.86
5. Step 5: Solve for x
   x = 5,351,859.86/2,081.73
6. Step 6: Final answer
   x = 2,570.87