Finding the Fourth Proportional to 3,866.91, 5,796.90 and 1,891.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,866.91 : 5,796.90 = 1,891.42 : x
2. Step 2: Convert to fraction form
   3,866.91/5,796.90 = 1,891.42/x
3. Step 3: Cross multiply
   3,866.91x = 5,796.90 × 1,891.42
4. Step 4: Simplify right side
   3,866.91x = 10,964,358.11
5. Step 5: Solve for x
   x = 10,964,358.11/3,866.91
6. Step 6: Final answer
   x = 2,835.43