Finding the Fourth Proportional to 1,342.86, 1,852.82 and 818.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.86 : 1,852.82 = 818.90 : x
2. Step 2: Convert to fraction form
   1,342.86/1,852.82 = 818.90/x
3. Step 3: Cross multiply
   1,342.86x = 1,852.82 × 818.90
4. Step 4: Simplify right side
   1,342.86x = 1,517,260.94
5. Step 5: Solve for x
   x = 1,517,260.94/1,342.86
6. Step 6: Final answer
   x = 1,129.87