Finding the Fourth Proportional to 1,483.12, 2,046.72 and 853.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.12 : 2,046.72 = 853.78 : x
2. Step 2: Convert to fraction form
   1,483.12/2,046.72 = 853.78/x
3. Step 3: Cross multiply
   1,483.12x = 2,046.72 × 853.78
4. Step 4: Simplify right side
   1,483.12x = 1,747,448.60
5. Step 5: Solve for x
   x = 1,747,448.60/1,483.12
6. Step 6: Final answer
   x = 1,178.22