Finding the Fourth Proportional to 1,436.43, 1,982.21 and 806.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.43 : 1,982.21 = 806.88 : x
2. Step 2: Convert to fraction form
   1,436.43/1,982.21 = 806.88/x
3. Step 3: Cross multiply
   1,436.43x = 1,982.21 × 806.88
4. Step 4: Simplify right side
   1,436.43x = 1,599,401.57
5. Step 5: Solve for x
   x = 1,599,401.57/1,436.43
6. Step 6: Final answer
   x = 1,113.46