Finding the Fourth Proportional to 2,884.23, 3,978.59 and 2,689.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,884.23 : 3,978.59 = 2,689.83 : x
2. Step 2: Convert to fraction form
   2,884.23/3,978.59 = 2,689.83/x
3. Step 3: Cross multiply
   2,884.23x = 3,978.59 × 2,689.83
4. Step 4: Simplify right side
   2,884.23x = 10,701,717.29
5. Step 5: Solve for x
   x = 10,701,717.29/2,884.23
6. Step 6: Final answer
   x = 3,710.42