Finding the Fourth Proportional to 1,441.51, 1,988.83 and 811.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.51 : 1,988.83 = 811.94 : x
2. Step 2: Convert to fraction form
   1,441.51/1,988.83 = 811.94/x
3. Step 3: Cross multiply
   1,441.51x = 1,988.83 × 811.94
4. Step 4: Simplify right side
   1,441.51x = 1,614,798.66
5. Step 5: Solve for x
   x = 1,614,798.66/1,441.51
6. Step 6: Final answer
   x = 1,120.22