Finding the Fourth Proportional to 1,436.26, 1,981.98 and 806.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.26 : 1,981.98 = 806.80 : x
2. Step 2: Convert to fraction form
   1,436.26/1,981.98 = 806.80/x
3. Step 3: Cross multiply
   1,436.26x = 1,981.98 × 806.80
4. Step 4: Simplify right side
   1,436.26x = 1,599,061.46
5. Step 5: Solve for x
   x = 1,599,061.46/1,436.26
6. Step 6: Final answer
   x = 1,113.35