Finding the Fourth Proportional to 1,308.03, 1,804.73 and 842.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.03 : 1,804.73 = 842.55 : x
2. Step 2: Convert to fraction form
   1,308.03/1,804.73 = 842.55/x
3. Step 3: Cross multiply
   1,308.03x = 1,804.73 × 842.55
4. Step 4: Simplify right side
   1,308.03x = 1,520,571.05
5. Step 5: Solve for x
   x = 1,520,571.05/1,308.03
6. Step 6: Final answer
   x = 1,162.49