Finding the Fourth Proportional to 1,342.25, 1,851.86 and 811.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.25 : 1,851.86 = 811.29 : x
2. Step 2: Convert to fraction form
   1,342.25/1,851.86 = 811.29/x
3. Step 3: Cross multiply
   1,342.25x = 1,851.86 × 811.29
4. Step 4: Simplify right side
   1,342.25x = 1,502,399.91
5. Step 5: Solve for x
   x = 1,502,399.91/1,342.25
6. Step 6: Final answer
   x = 1,119.32