Finding the Fourth Proportional to 1,435.79, 1,981.22 and 806.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.79 : 1,981.22 = 806.18 : x
2. Step 2: Convert to fraction form
   1,435.79/1,981.22 = 806.18/x
3. Step 3: Cross multiply
   1,435.79x = 1,981.22 × 806.18
4. Step 4: Simplify right side
   1,435.79x = 1,597,219.94
5. Step 5: Solve for x
   x = 1,597,219.94/1,435.79
6. Step 6: Final answer
   x = 1,112.43