Finding the Fourth Proportional to 2,891.58, 3,987.27 and 2,830.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,891.58 : 3,987.27 = 2,830.83 : x
2. Step 2: Convert to fraction form
   2,891.58/3,987.27 = 2,830.83/x
3. Step 3: Cross multiply
   2,891.58x = 3,987.27 × 2,830.83
4. Step 4: Simplify right side
   2,891.58x = 11,287,283.53
5. Step 5: Solve for x
   x = 11,287,283.53/2,891.58
6. Step 6: Final answer
   x = 3,903.50