Finding the Fourth Proportional to 1,788.91, 2,682.82 and 863.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.91 : 2,682.82 = 863.89 : x
2. Step 2: Convert to fraction form
   1,788.91/2,682.82 = 863.89/x
3. Step 3: Cross multiply
   1,788.91x = 2,682.82 × 863.89
4. Step 4: Simplify right side
   1,788.91x = 2,317,661.37
5. Step 5: Solve for x
   x = 2,317,661.37/1,788.91
6. Step 6: Final answer
   x = 1,295.57