Finding the Fourth Proportional to 2,109.43, 3,163.34 and 842.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.43 : 3,163.34 = 842.59 : x
2. Step 2: Convert to fraction form
   2,109.43/3,163.34 = 842.59/x
3. Step 3: Cross multiply
   2,109.43x = 3,163.34 × 842.59
4. Step 4: Simplify right side
   2,109.43x = 2,665,378.62
5. Step 5: Solve for x
   x = 2,665,378.62/2,109.43
6. Step 6: Final answer
   x = 1,263.56