Finding the Fourth Proportional to 1,342.74, 1,852.74 and 811.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.74 : 1,852.74 = 811.47 : x
2. Step 2: Convert to fraction form
   1,342.74/1,852.74 = 811.47/x
3. Step 3: Cross multiply
   1,342.74x = 1,852.74 × 811.47
4. Step 4: Simplify right side
   1,342.74x = 1,503,442.93
5. Step 5: Solve for x
   x = 1,503,442.93/1,342.74
6. Step 6: Final answer
   x = 1,119.68