Finding the Fourth Proportional to 1,335.62, 1,843.49 and 812.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,335.62 : 1,843.49 = 812.09 : x
2. Step 2: Convert to fraction form
   1,335.62/1,843.49 = 812.09/x
3. Step 3: Cross multiply
   1,335.62x = 1,843.49 × 812.09
4. Step 4: Simplify right side
   1,335.62x = 1,497,079.79
5. Step 5: Solve for x
   x = 1,497,079.79/1,335.62
6. Step 6: Final answer
   x = 1,120.89