Finding the Fourth Proportional to 1,435.91, 1,981.56 and 806.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.91 : 1,981.56 = 806.46 : x
2. Step 2: Convert to fraction form
   1,435.91/1,981.56 = 806.46/x
3. Step 3: Cross multiply
   1,435.91x = 1,981.56 × 806.46
4. Step 4: Simplify right side
   1,435.91x = 1,598,037.67
5. Step 5: Solve for x
   x = 1,598,037.67/1,435.91
6. Step 6: Final answer
   x = 1,112.91