Finding the Fourth Proportional to 1,436.09, 1,981.74 and 806.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.09 : 1,981.74 = 806.61 : x
2. Step 2: Convert to fraction form
   1,436.09/1,981.74 = 806.61/x
3. Step 3: Cross multiply
   1,436.09x = 1,981.74 × 806.61
4. Step 4: Simplify right side
   1,436.09x = 1,598,491.30
5. Step 5: Solve for x
   x = 1,598,491.30/1,436.09
6. Step 6: Final answer
   x = 1,113.09