Finding the Fourth Proportional to 1,366.52, 1,885.41 and 842.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.52 : 1,885.41 = 842.85 : x
2. Step 2: Convert to fraction form
   1,366.52/1,885.41 = 842.85/x
3. Step 3: Cross multiply
   1,366.52x = 1,885.41 × 842.85
4. Step 4: Simplify right side
   1,366.52x = 1,589,117.82
5. Step 5: Solve for x
   x = 1,589,117.82/1,366.52
6. Step 6: Final answer
   x = 1,162.90