Finding the Fourth Proportional to 1,441.33, 1,988.96 and 811.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.33 : 1,988.96 = 811.96 : x
2. Step 2: Convert to fraction form
   1,441.33/1,988.96 = 811.96/x
3. Step 3: Cross multiply
   1,441.33x = 1,988.96 × 811.96
4. Step 4: Simplify right side
   1,441.33x = 1,614,941.96
5. Step 5: Solve for x
   x = 1,614,941.96/1,441.33
6. Step 6: Final answer
   x = 1,120.46