Finding the Fourth Proportional to 1,335.38, 1,843.02 and 811.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.38 : 1,843.02 = 811.31 : x
2. Step 2: Convert to fraction form
   1,335.38/1,843.02 = 811.31/x
3. Step 3: Cross multiply
   1,335.38x = 1,843.02 × 811.31
4. Step 4: Simplify right side
   1,335.38x = 1,495,251.34
5. Step 5: Solve for x
   x = 1,495,251.34/1,335.38
6. Step 6: Final answer
   x = 1,119.72