Finding the Fourth Proportional to 1,435.79, 1,981.41 and 806.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.79 : 1,981.41 = 806.45 : x
2. Step 2: Convert to fraction form
   1,435.79/1,981.41 = 806.45/x
3. Step 3: Cross multiply
   1,435.79x = 1,981.41 × 806.45
4. Step 4: Simplify right side
   1,435.79x = 1,597,908.09
5. Step 5: Solve for x
   x = 1,597,908.09/1,435.79
6. Step 6: Final answer
   x = 1,112.91