Finding the Fourth Proportional to 1,339.98, 1,849.56 and 842.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.98 : 1,849.56 = 842.61 : x
2. Step 2: Convert to fraction form
   1,339.98/1,849.56 = 842.61/x
3. Step 3: Cross multiply
   1,339.98x = 1,849.56 × 842.61
4. Step 4: Simplify right side
   1,339.98x = 1,558,457.75
5. Step 5: Solve for x
   x = 1,558,457.75/1,339.98
6. Step 6: Final answer
   x = 1,163.05