Finding the Fourth Proportional to 1,335.95, 1,843.59 and 811.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.95 : 1,843.59 = 811.97 : x
2. Step 2: Convert to fraction form
   1,335.95/1,843.59 = 811.97/x
3. Step 3: Cross multiply
   1,335.95x = 1,843.59 × 811.97
4. Step 4: Simplify right side
   1,335.95x = 1,496,930.55
5. Step 5: Solve for x
   x = 1,496,930.55/1,335.95
6. Step 6: Final answer
   x = 1,120.50