Finding the Fourth Proportional to 1,340.27, 1,849.35 and 842.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.27 : 1,849.35 = 842.55 : x
2. Step 2: Convert to fraction form
   1,340.27/1,849.35 = 842.55/x
3. Step 3: Cross multiply
   1,340.27x = 1,849.35 × 842.55
4. Step 4: Simplify right side
   1,340.27x = 1,558,169.84
5. Step 5: Solve for x
   x = 1,558,169.84/1,340.27
6. Step 6: Final answer
   x = 1,162.58