Finding the Fourth Proportional to 1,484.46, 2,048.61 and 855.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,484.46 : 2,048.61 = 855.20 : x
2. Step 2: Convert to fraction form
   1,484.46/2,048.61 = 855.20/x
3. Step 3: Cross multiply
   1,484.46x = 2,048.61 × 855.20
4. Step 4: Simplify right side
   1,484.46x = 1,751,961.03
5. Step 5: Solve for x
   x = 1,751,961.03/1,484.46
6. Step 6: Final answer
   x = 1,180.20