Finding the Fourth Proportional to 2,791.31, 3,849.45 and 2,159.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.31 : 3,849.45 = 2,159.83 : x
2. Step 2: Convert to fraction form
   2,791.31/3,849.45 = 2,159.83/x
3. Step 3: Cross multiply
   2,791.31x = 3,849.45 × 2,159.83
4. Step 4: Simplify right side
   2,791.31x = 8,314,138.35
5. Step 5: Solve for x
   x = 8,314,138.35/2,791.31
6. Step 6: Final answer
   x = 2,978.58