Finding the Fourth Proportional to 1,233.24, 1,849.89 and 842.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,233.24 : 1,849.89 = 842.31 : x
2. Step 2: Convert to fraction form
   1,233.24/1,849.89 = 842.31/x
3. Step 3: Cross multiply
   1,233.24x = 1,849.89 × 842.31
4. Step 4: Simplify right side
   1,233.24x = 1,558,180.85
5. Step 5: Solve for x
   x = 1,558,180.85/1,233.24
6. Step 6: Final answer
   x = 1,263.49