Finding the Fourth Proportional to 1,443.82, 1,991.52 and 853.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.82 : 1,991.52 = 853.93 : x
2. Step 2: Convert to fraction form
   1,443.82/1,991.52 = 853.93/x
3. Step 3: Cross multiply
   1,443.82x = 1,991.52 × 853.93
4. Step 4: Simplify right side
   1,443.82x = 1,700,618.67
5. Step 5: Solve for x
   x = 1,700,618.67/1,443.82
6. Step 6: Final answer
   x = 1,177.86