Finding the Fourth Proportional to 1,342.12, 1,852.47 and 818.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.12 : 1,852.47 = 818.59 : x
2. Step 2: Convert to fraction form
   1,342.12/1,852.47 = 818.59/x
3. Step 3: Cross multiply
   1,342.12x = 1,852.47 × 818.59
4. Step 4: Simplify right side
   1,342.12x = 1,516,413.42
5. Step 5: Solve for x
   x = 1,516,413.42/1,342.12
6. Step 6: Final answer
   x = 1,129.86